To test whether you have learned an idea or a definition, rephrase what you just learned without using the new word.

If you think you understand quantum mechanics, you don't understand quantum mechanics.

Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.

It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.

If you can't explain something to a first year student, then you haven't really understood .

God was invented to explain mystery. God is always invented to explain those things that you do not understand.

Nature uses only the longest threads to weave her patterns, so that each small piece of her fabric reveals the organization of the entire tapestry.

My rule is, when you are unhappy, think about it. But when you're happy, don't. Why spoil it? You're probably happy for some ridiculous reason and you'd just spoil it to know it.

Religion is a culture of faith; science is a culture of doubt.

The only way to deep happiness is to do something you love to the best of your ability

Einstein was a giant. His head was in the clouds, but his feet were on the ground. But those of us who are not that tall have to choose!

The truly unsettling thing about being a woman was needing a man to realise one's full potential

Please do not mistake me for a twopenny villain. I do nothing without a purpose.

Talent is helpful in writing but guts are absolutely necessary.

ALGEBRA is a general Method of Computation by certain Signs and Symbols which have been contrived for this Purpose, and found convenient.

We are made by God, we are made like God, we are made for God.

every mind is at least as heavy as mine

I was having my teens in my 30s.

If you're the smartest person in the room, you're in the wrong room.

Law hath dominion over all things, over universal mind and matter; For there are reciprocities of rights, which no creature can gainsay.

A classic engineering mistake and one I've made is confusing what is hard and what is valuable.