The next morning, the two had dried noodles and fish fillet porridge at a snack shop near the hotel, and then drove to Qingxiu Mountain, a famous local scenic spot.

The mountains in the Qingxiu Mountain Scenic Area are undulating, the peaks are stacked and green, the spring is clear and the stone is strange, it is known that the mountain is not high and beautiful, and the water is not deep and clear.

There is a poem as evidence: "The green mountains are often not old, the wanderer Tianya feels good spring, I bring spring to the mountain, and the mountain flowers bloom in spring." ”

When they arrived at Peach Blossom Island, this time was not the season when the peach blossoms were in full bloom, Yang Bishan asked Qi Feiyang to stand next to the stone engraved with the three words of Peach Blossom Island, took a few close-ups of him, and sent the photos to the group after P a few big peach blossoms on the photo.

The two walked along, looking at the pedestrians walking leisurely on the tree-lined path, and the aunt dancing in the open space next to them, and their hearts were peaceful.

Yang Bishan held Qi Feiyang's arm and suddenly sighed: "I remembered an allusion, someone asked the Buddha what is a Buddha, and the Buddha said: Worry-free is a Buddha!" If you look at these people, although they don't necessarily have much wealth or high social status, they are actually quite happy! ”

Qi Feiyang said: "Yes, it is said that contentment is always happy, and the suffering of all living beings is mostly due to discontentment, all because they are obsessed with asking and do not know what to want. The world is impermanent, there is a definite number of fate and fate, why not observe it truthfully, although there is a request, you must eventually let go, gains and losses are ups and downs, not happy or sad, let the heart settle down. Everything has a way of doing things, like a dream bubble, like dew and electricity, and should be viewed as such. ”

Yang Bishan said with a smile: "Haven't you always been indifferent to Buddhism, why are you opening your mouth today to be Zen!" ”

Qi Feiyang said with a smile: "Although I am not interested in studying Buddhism, it doesn't mean that I can't absorb the essence of it!" Moreover, although Buddhism and Taoism are self-contained, they also have many things in common with each other, both of which are exploring the relationship between man and nature and the mysteries of all things in the universe, and in terms of social relations, they are both guiding people to goodness, cultivating their minds and accumulating virtues, and in the final analysis, they are all pursuing the most harmonious social state, which can be said to be the same goal. ”

Yang Bishan said: "My husband is reasonable! But I think there is a difference between the two, I think the Buddha is looking down on the compassion of all sentient beings, his eyes are full of compassion for ignorant sentient beings, and he hates to transform all people with great wishes. And Daozu is a kind white-bearded old man, who always tells us with a smile, children, the Tao is the law of nature, as long as you follow nature, you will get the Tao! ”

Qi Feiyang smiled: "Congratulations, you got it right!" Haha......"

Yang Bishan glanced at him and said angrily: "Stinky goat, even if I say it wrong, don't laugh at me like this!" ”

Qi Feiyang said: "How can I laugh at you, I think what you said is full of reason, really!" ”

"Then tell me, what's the reason!"

"If you look at these people, everyone has a Buddha in their hearts, and that is good thoughts, but everyone also has a demon in their hearts, and that is greed and hatred, and if you get rid of greed and hatred, then everyone is a Buddha! It's a pity that it is too difficult for ordinary people to get rid of demonic thoughts, so the Buddha has to use compassion and great wishes to transform sentient beings.

When it comes to Taoism, the essence of conforming to nature is to do nothing, simply put, don't toss around, and the ugly point is that human beings don't take themselves too seriously!

Because the earth is only a tiny speck of dust in the universe, human beings are one of the species parasitic in this dust, not even bacteria, no matter how much they toss, they can't change anything, and the final outcome is only one, that is, extinction, which is the law of nature, and no one can change it! ”

"Yes, we used to hear people say that people will win the day, but now we think it's really ridiculous! According to you, then what's the point of us cultivating? ”

"Life is meaningless, cultivation is just to break through some shackles in the process of understanding nature, hoping to surpass a certain limit of living beings, but cultivating into an immortal is an act against the sky in a sense, but it is also meaningless in nature, even if it is immortal, it is just a proof of existence, and you can have more time to witness the evolution of all things in the universe, and that's it."

Then the two went to the Dragon Statue Tower, also known as the Qingshan Tower, which is the landmark building of Qingxiu Mountain. Located at the top of Qingxiu Mountain, it was built in the Wanli period of the Ming Dynasty, built by Xiao Yunju, a Jinshi from Yongcheng who was the left servant of the Ministry of Officials at that time, and took the meaning of the Buddhist scripture "the water dragon is strong, and the land is strong", so it is named "Dragon Elephant Tower".

In ancient times, rivers were often flooded, and the ancestors of many places often built high towers on the banks of the river, hoping to lock the water dragon and suppress the river demons, hoping to clear the river and live and work in peace and contentment.

The two walked along the steps all the way to the ninth floor, looking out of the window, overlooking Yongcheng, but saw that the new city was lined with high-rise buildings, and the buildings in the old city were lined with green trees.

Yang Bishan looked at the layers of buildings and said, "Feiyang, do you think the dense buildings in the city look like ant nests?" ”

"Like, if we fly into the air, it will be more like! In fact, not to mention that in the universe, even in the solar system, we human beings are ants or even bacteria-like existences, but human beings sit in the well and watch the sky and are self-righteous, and regard themselves as the masters of the world! ”

"Well said!" There were voices of praise from the side.

When the two heard the sound, they turned around and saw an old man in his 50s standing next to them, looking at them with a smile.

I saw that he was wearing an old suit, and the material seemed to be a little classy, but he made it crumpled like a stall, his face was unkempt, and his gray hair was messy, and he looked like he hadn't taken care of it for a long time.

"Two little friends, my name is Ai Yinsi, I teach at Yongcheng University and have studied astrophysics for decades, so you are here to travel, right?"

"Hello Mr. Ai, we are here from Lingnan to travel."

"Looking at the two of you, how can you have the emotion just now?"

"We just thought about it for a while, talking nonsense, which made Teacher Ai laugh."

"No, no, no, it's not cranky, it's curiosity, and the progress of human science and technology starts with curiosity. Would you mind walking together? ”

"Good! I want to ask Professor Ai for advice! ”

"Don't call me Professor Ai, you should call me Professor Tan."

"Why is that?"

"The students and teachers at the school said that I was usually unkempt, and I was engaged in physics research, and my name was similar to Einstein, only one word "Tan" was missing, so everyone didn't call me by my name, but usually called me Professor Tan, but after a long time, I was not used to being called Professor Ai. ”

When Qi Feiyang and Yang Bishan heard this, they both felt funny, it seems that this Professor Tan is also a wonderful person.

The three of them got off the tower and walked along Longxiang Road in the direction of Tianchi, and Professor Ai asked, "Xiao Qi, what are you and Xiao Yang doing in Lingnan?" ”

"I'm a country doctor, and she works in a pharmaceutical factory."

"Hey, how did you get interested in the universe?"

"It's just a hobby, and I have some thoughts about everything in the universe, but just some superficial opinions."

"Then let me ask you a question, why is the sky dark at night?"

Yang Bishan was stunned, she didn't know why Professor Tan would ask such a simple question, which even a three-year-old child could answer.

Qi Feiyang fell into deep thought, and said for a long time: "Only stars can shine in the universe, if there are enough stars, the night sky must be bright, which means that the number of stars is limited, or some places in the universe are opaque, or the propagation of light is actually limited by distance, and light that is too far away cannot be transmitted." ”

"The little guy has good logical thinking skills, but it's not accurate to say that only stars shine, and there is a planet called brown dwarfs that can also emit faint light."

Professor Tan gave Qi Feiyang a thumbs up and continued: "The question just now was put forward by a German astronomer Obots, so it is called the 'Obos paradox', many people feel idiotic when they hear this question, but it contains conjectures about the origin of the universe. ”

"Oh, I want to hear about it!"

O'Bos proposed that if the universe is a constant state of infinite space, and that there are countless stars in the universe that are roughly evenly distributed, because the illuminance of the stellar luminaries is inversely proportional to the square of the distance, the superposition effect of the illumination of countless luminaries will make there be no dark places between stars, and the entire dark night sky will be extremely bright. The Big Bang theory, based on general relativity, provides the best explanation for Olbers's paradox, which shows that the universe is not constant, but dynamic and aged. ”

Professor Tan paused for a moment, and then said: "Here we also lead to the phenomenon of cosmic redshift, which refers to the phenomenon that the electromagnetic radiation of an object increases in wavelength for some reason, and in the visible light band, it is manifested as the spectral line of the spectrum moves a certain distance towards the red end, that is, the wavelength becomes longer and the frequency decreases. To put it simply, the extremely high-energy radiation of the original Big Bang is transformed into extremely low-energy cosmic microwave background radiation, and all galaxies have a redshift of different sizes due to their movement away from our earth and the Milky Way, causing the light to gradually weaken, and you can also understand that the propagation of light is limited by distance. ”

Yang Bishan said: "What Professor Tan said is too profound for us to understand. I have a question for me, why is there gravitational attraction between planets? I know that the planets of the solar system do not revolve around the sun in the same dimension, why don't they fly out due to centrifugal force? ”

"Whether it's the gravitational pull between planets or between things, it's because of the magnetic field. As for whether the planets will fly out of the solar system, I think it will happen sooner or later, because the magnetic field of the galaxy is changing all the time, and the stars will definitely become white dwarfs, and these changes are only a momentary matter for the universe, but they are too far away for humans.

A long time ago, the earth did not have a south pole and a north pole as it does now, revolving around the sun at a certain angle, but was constantly tumbling, so at that time extreme cold and extreme heat alternated, and human beings could not survive. Later, the earth had a little partner, that is, the moon, which revolves around the earth at a certain distance, and its gravitational pull makes the earth always maintain a certain angle of rotation, which is why there are north and south poles, and there is stable climate change, which produces a lot of life. ”