The probability that we may fail in the struggle ought not to deter us from the support of a cause we believe to be just.

There is no man living that can not do more than he thinks he can. 

The pursuit of truth does not permit violence on one's opponent.

You don't change the course of history by turning the faces of portraits to the wall.

For a successful revolution it is not enough that there is discontent. What is required is a profound and thorough conviction of the justice, necessity and importance of political and social rights.

Everything comes to him who hustles while he waits.

With the fearful strain that is on me night and day, if I did not laugh I should die.

We forge the chains we wear in life.

Follow the path of the unsafe, independent thinker. Expose your ideas to the danger of controversy. Speak your mind and fear less the label of 'crackpot' than the stigma of conformity. 

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

Friendship is evolving into a relationship of convenience.

A man should look for what is, and not for what he thinks should be.