We hear only those questions for which we are in a position to find answers.

I don’t pretend to understand the Universe – it’s a great deal bigger than I am.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

If I get stuck, I look at a book that tells me how someone else did it. I turn the pages, and then I say, ‚Oh, I forgot that bit,‘ then close the book and carry on. Finally, after you’ve figured out how to do it, you read how they did it and find out how dumb your solution is and how much more clever and efficient theirs is!

The degree of one’s emotions varies inversely with one’s knowledge of the facts.

To know, is to know that you know nothing. That is the meaning of true knowledge.

True virtue is life under the direction of reason.

Unbeing dead isn’t being alive.

I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.

Happiness is a virtue, not its reward.

A child wants things to be a certain way. When you get to be an adult, you just understand that some people are good, some are not, and you can’t be naive.

A learned blockhead is a greater blockhead than an ignorant one.

Knowledge rests not upon truth alone, but upon error also.

If a nation expects to be ignorant and free, in a state of civilization, it expects what never was and never will be.

It’s really easy to have a nice philosophy about openness, but moving the world in that direction is a different thing. It requires both understanding where you want to go and being pragmatic about getting there.

We are symbols, and inhabit symbols.

I am not bound to win, but I am bound to be true. I am not bound to succeed, but I am bound to live by the light that I have. I must stand with anybody that stands right, and stand with him while he is right, and part with him when he goes wrong.

He who knows best knows how little he knows.

The world embarrasses me, and I cannot dream that this watch exists and has no watchmaker.

O wretched man, wretched not just because of what you are, but also because you do not know how wretched you are!

We have to stop and be humble enough to understand that there is something called mystery.

Theology is the effort to explain the unknowable in terms of the not worth knowing.

I hope I have helped to raise the profile of science and to show that physics is not a mystery but can be understood by ordinary people.

When the gods wish to punish us they answer our prayers.

The study and knowledge of the universe would somehow be lame and defective were no practical results to follow.

The only source of knowledge is experience.

The price one pays for pursuing any profession, or calling, is an intimate knowledge of its ugly side.

Man is not a machine that can be remodelled for quite other purposes as occasion demands, in the hope that it will go on functioning as regularly as before but in a quite different way. He carries his whole history with him; in his very structure is written the history of mankind.

People take different roads seeking fulfillment and happiness. Just because they’re not on your road doesn’t mean they’ve gotten lost.

When he to whom one speaks does not understand, and he who speaks himself does not understand, that is metaphysics.

The first lesson a revolutionary must learn is that he is a doomed man.

Whatever you cannot understand, you cannot possess.

The world itself is the will to power – and nothing else! And you yourself are the will to power – and nothing else!

You are the universe, you aren’t in the universe.

As a blind man has no idea of colors, so have we no idea of the manner by which the all-wise God perceives and understands all things.

Happiness and moral duty are inseparably connected.

In the affairs of this world, men are saved not by faith, but by the want of it.

The misfortune of the wise is better than the prosperity of the fool.

Truth is the beginning of every good to the gods, and of every good to man.

If one is master of one thing and understands one thing well, one has at the same time, insight into and understanding of many things.

Europe was created by history. America was created by philosophy.

Nothing is so wretched or foolish as to anticipate misfortunes. What madness is it to be expecting evil before it comes.

Me is a common sense man. That mean when me explain things, me explain it in a very simple way; that mean if I explain it to a baby, the baby will understand too, you know.

Nature does nothing in vain.

Nobody cares how much you know, until they know how much you care.

Effective communication is 20% what you know and 80% how you feel about what you know.

Listen, I think that people want a president who is going to be interested in the things that keep them up at night, the things that are weighing on them, the things that are debilitating and can be addressed.

Knowledge will give you power, but character respect.

Science investigates; religion interprets. Science gives man knowledge which is power; religion gives man wisdom which is control.

I am no longer sure of anything. If I satiate my desires, I sin but I deliver myself from them; if I refuse to satisfy them, they infect the whole soul.

Everything that happens once can never happen again. But everything that happens twice will surely happen a third time.

Exaggeration is truth that has lost its temper.

Everything is political. I will never be a politician or even think political. Me just deal with life and nature. That is the greatest thing to me.

A tomb now suffices him for whom the whole world was not sufficient.

What is earnest is not always true; on the contrary, error is often more earnest than truth.

There is a single light of science, and to brighten it anywhere is to brighten it everywhere.

But if nothing but soul, or in soul mind, is qualified to count, it is impossible for there to be time unless there is soul, but only that of which time is an attribute, i.e. if change can exist without soul.

The doorstep to the temple of wisdom is a knowledge of our own ignorance.

Law is mind without reason.

Man is but a reed, the most feeble thing in nature, but he is a thinking reed.

All men are born with a nose and five fingers, but no one is born with a knowledge of God.