Every father should remember one day his son will follow his example, not his advice.

The person who doesn't know something can't be done will often find a way to go ahead and do it.

Nothing ever built arose to touch the skies unless some man dreamed that it should, some man believed that it could, and some man willed that it must.

A research problem is not solved by apparatus; it is solved in a man's head.

Every great improvement has come after repeated failures. Virtually nothing comes out right the first time. Failures, repeated failures, are finger posts on the road to achievement. One fails forward toward success.

High achievement always takes place in the framework of high expectation.

Our imagination is the only limit to what we can hope to have in the future.