The creative principle [of science] resides in mathematics.

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.

learn from the past live in the present plan for the future

When people undermine your values, they've strong reasons. For example, they mistaken your passion for excellence as perfectionism...

Would you like to feel a calm confidence when you walk into a room full of strangers, knowing that you can start new a conversation with anyone?

Do silly things. Foolishness is a great deal more vital and healthy than our straining and striving after a meaningful life.

The enjoyment of one's tools is an essential ingredient of successful work.

Writing [is] a form of prayer.

A good word is an easy obligation; but not to speak ill requires only our silence, which costs us nothing.

The sinews of war are not gold, but good soldiers; for gold alone will not procure good soldiers, but good soldiers will always procure gold.

Creativity is harnessing universality and making it flow through your eyes.