Fish live in water. Without water, they will die of thirst. The fish here can compete with people. People live in a society, although it looks small, but it is particularly cruel. Obviously, you have worked hard and have been working hard, but life will still give you a heavy blow and erase all your hopes.
Fish will not be drowned by water. If it is hot water, it will burn the fish to death. Just like people, when they first come into contact with society, they are a piece of pure white paper, but gradually they have no dreams, and life is like a stagnant pool without hope.
Birds are animals that fly in the sky, but if they fly high, they will die of lack of oxygen. Cats themselves are not afraid of fish, but they are afraid of crocodiles. People themselves can be on the road to success, but unfortunately they choose to give up after persisting in half. In addition, this passage can be understood as a relationship, which is sweet at first, then hurts each other and finally becomes a stranger.