“Great ideas often receive violent opposition from mediocre minds.”

A man should look for what is, and not for what he thinks should be.

Peace cannot be kept by force. It can only be achieved by understanding.

Logic will get you from A to B. Imagination will take you everywhere.

One may say the eternal mystery of the world is its comprehensibility.

In the middle of every difficulty lies opportunity.

I never think of the future. It comes soon enough.

If A is success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut.

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