Excerpts are as follows:

1, human life is limited, but serving the people is infinite. I will devote my limited life to serving the people indefinitely. (Lei Feng)

I have always maintained the belief that the meaning of life lies in giving, not in receiving, nor in striving. (Ba Jin)

For me, the meaning of life lies in putting yourself in others' shoes, worrying about others and enjoying others' happiness. (Einstein)

The first 19 lesson "Life Life" also has a sentence:

Although life is short, we can make limited life reflect infinite value. (Xinglinzi)