The world is like a chess game, and once you enter the chess game, it is as deep as the sea. You think you're a chess player, but how do you know you're not a pawn in someone else's hands? You think that the chess player is your chess piece, but how do you know that there is another chess game in the chess game? If heaven and earth are chessboards, then you and I are both chess pieces. If you and I are chessboards, then heaven and earth are chess pieces. Whether it is man or God, who can be the ruler of whom?