The special theory of relativity owes its origins to Maxwell's equations of the electromagnetic field.

Gravitation is not responsible for people falling in love.

Life is like riding a bicycle. To keep your balance, you must keep moving.

Life isn't worth living, unless it is lived for someone else.

Imagination is everything. It is the preview of life's coming attractions.

Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

Strive not to be a success, but rather to be of value.

The true sign of intelligence is not knowledge but imagination.

God is clever but not dishonest.

Try not to become a man of success but rather a man of value.

Weakness of attitude becomes weakness of character.

Your education is your life.

Freedom, joy or bliss doesn't come from the situation that we think we should be, but it derives from the one that we are already in.

Those bitter sorrows of childhood!-- when sorrow is all new and strange, when hope has not yet got wings to fly beyond the days and weeks, and the space from summer to summer seems measureless.

I was living a charmed life.

Nothing baffles the schemes of evil people so much as the calm composure of great souls.

We all give ourselves a lot of leeway, but we want consistency from other people.

Comedy is helping a lot at the moment. It also seems to be getting under Trump's skin and revealing a lot about the kind of thin-skinned fool that he is.

The poison of skepticism becomes, like alcoholism, tuberculosis, and some other diseases, much more virulent in a hitherto virgin soil.

If you're not in New York, you're camping out.

Even in earliest youth my fondest desire was to understand Nature, and thus to come closer to the truth; a truth that I was unable to discover either at school or in church.