If there were no bad people, there would be no good lawyers.
Courage, conviction and confidence.
Science is what we have learned about how to keep from fooling ourselves.
Books are for people who wish they were somewhere else.
I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.
If the facts don't fit the theory, change the facts.
Free the child's potential, and you will transform him into the world.
Seek knowledge from the cradle to the grave.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.
A little knowledge is a dangerous thing. So is a lot.
The reading of all good books is like conversation with the finest men of past centuries.
Dare to think for yourself.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.
The ability to observe without evaluating is the highest form of intelligence.
What is freedom of expression? Without the freedom to offend, it ceases to exist.
He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.
Knowing others is wisdom, knowing yourself is Enlightenment.
The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.
Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.