Quotes by Albert Einstein

The hardest thing to understand

The hardest thing to understand in the world is the income tax.

The pursuit of truth and beauty

The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives.

Prepare for and prevent war

You cannot simultaneously prepare for and prevent war.

The laws of mathematics

As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.

If only I had known

If only I had known, I would have been a locksmith.

As simple as possible

Everything should be made as simple as possible -- but no simpler!

Only two things are infinite

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.