Learning is like sailing against the current. If you don’t advance, you will retreat. If you don’t learn, you will perish.

Youth is like early spring, like the morning sun, like the sprouting of hundreds of flowers, like the new hair of a sharp blade, it is the most precious period of life. Youth are still fresh and lively cells in society.

Science and democracy are the two main driving forces for the progress of human society.

The merits of religion are to overcome the weak and encourage good, which is not without benefit to the people; however, its superstitious belief in divine authority blocks people's wisdom, which is a shortcoming.