We are all born ignorant, but one must work hard to remain stupid
No one can make you feel inferior without your consent.
Nothing fixes a thing so intensely in the memory as the wish to forget it.
Obsession is the wellspring of genius and madness.
Each problem that I solved became a rule which served afterwards to solve other problems.
Experience is merely the name men gave to their mistakes.
Learned we may be with another man's learning: we can only be wise with wisdom of our own.
The future is uncertain but the end is always near.
Bitterness is like cancer. It eats upon the host. But anger is like fire. It burns it all clean.
The ultimate authority must always rest with the individual's own reason and critical analysis.
Those who know, do. Those that understand, teach.
The difference between stupidity and genius is that genius has its limits.
Be frank and explicit. That is the right line to take when you wish to conceal your own mind and to confuse the minds of others.
Resist much. Obey little.
Yesterday is but today's memory and tomorrow is today's dream.
The impossible could not have happened, therefore the impossible must be possible in spite of appearances.
Respect yourself if you would have others respect you.
If we do not lay out ourselves in the service of mankind whom should we serve?
What's real and what's true aren't necessarily the same.
He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.
There are four ways, and only four ways, in which we have contact with the world. We are evaluated and classified by these four contacts: what we do, how we look, what we say, and how we say it.