Study The Past If You Would Define The Future

Look back over the past, with its changing empires that rose and fell, and you can foresee the future, too.

Confine yourself to the present.

Life is a preparation for the future; and the best preparation for the future is to live as if there were none.

Now he has departed from this strange world a little ahead of me. That means nothing. People like us, who believe in physics, know that the distinction between past, present, and future is only a stubbornly persistent illusion.

The universe is change; life is understanding.

Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.