-Marx

If a person only works for himself, he may become a famous scholar, a great sage and an excellent poet, but he can never be a truly perfect poet.

-Marx

If we choose a career that can work best for human welfare, we will not be overwhelmed by his burden, because it is a sacrifice for all mankind; At that time, we will not feel a little self-confessed and pitiful joy, our happiness will belong to millions of people, and our cause will not be prominent for a while, but it will exist forever; In the face of our ashes, noble people will shed tears.

-Marx