Far more crucial than what we know or do not know is what we do not want to know.

The hardest arithmetic to master is that which enables us to count our blessings.

Propaganda does not deceive people; it merely helps them to deceive themselves.

The real Antichrist is he who turns the wine of an original idea into the water of mediocrity.

I hang onto my prejudices, they are the testicles of my mind.

I can never forget that one of the most gifted, best educated nations in the world, of its own free will, surrendered its fate into the hands of a maniac.

The suspicious mind believes more than it doubts. It believes in a formidable and ineradicable evil lurking in every person.

We are more ready to try the untried when what we do is inconsequential. Hence the remarkable fact that many inventions had their birth as toys.

Creativity is the ability to introduce order into the randomness of nature.

Nonconformists travel as a rule in bunches. You rarely find a nonconformist who goes it alone. And woe to him inside a nonconformist clique who does not conform with nonconformity.

When hopes and dreams are loose in the streets, it is well for the timid to lock doors, shutter windows and lie low until the wrath has passed.

Destiny is purpose seen from the other end of life.

And for Peter... well, sometimes cruelty is kindness in disguise. Sometimes pain is the best teacher. Sometimes it does you no harm to realize that there's a limit to what you can get away with.

Every skilled person is to be believed with reference to his own art.

We have learned that power is a positive force if it is used for positive purposes.

Happy Days was a wonderful, wonderful experience and I would not have traded it for the world.

Today's wars are about oil. But alternate energies exist now - solar, wind - for every important energy-using activity in our lives. The only human work that cannot be done without oil is war.

...when everything else fails, we communicate in the language of the stars

Just out here workin' hard and doin' what we do best: grind, hustle, and anything possible to create new opportunities.

You may translate books of science exactly. ... The beauties of poetry cannot be preserved in any language except that in which it was originally written.

Another fresh new year is here. Another year to live! To Banish worry, doubt and fear, to love and give