On the road of scientific exploration, it is not a bad thing for a person to take detours and make mistakes, let alone shame. We should have the courage to admit and correct our mistakes in practice.

We learn to think in the process of labor. Because of our labor, we know the mystery of the world, so we really changed our lives.

I've basically worked hard all my life. I can say that I have lived for 75 years, and I have not lived comfortably for a month. It's like pushing a stone up a mountain, and the stone keeps rolling down and pushing it up.

I know what labor is: labor is the source of all happiness and all good things in the world.

Action is a good medicine to cure fear, and hesitation and procrastination will continue to nourish fear.