I don't know if I'm lucky. What's the next sentence?

The ship doesn't know how to flow in the water.

The first half of the sentence says that people always see the ownership or achievements of others, but rarely appreciate and cherish what they have, and human nature is often dissatisfied. The second half of the sentence says that people always don't know whether they are making progress or going backwards, because they can't feel it in it. It also reminds people to listen to the advice given by outsiders, and also reminds themselves not to forget their progress at all times.

These two words are in it without knowing it.

I don't know when to be happy. Explanation:

Different people have different definitions. The poor think that money is happiness, and the rich think that more money is happiness. But in fact, many people don't know when they are blessed.

Hungry food is happiness, thirsty water is happiness, sleepy sleep is happiness, these simple things are happiness, but many people never care, so the poor are not happy in the face of their warm family, and they must have money to be happy.

Rich people don't feel happy and worry about the maintenance of wealth every day. All people pin their hopes on what they don't have and can't get, but pay little attention to the happiness they already have.