Every production of genius must be the production of enthusiasm.

Never apologize for showing feeling. When you do so, you apologize for the truth.

The secret of success is constancy of purpose.

Cleanliness and order are not matters of instinct; they are matters of education, and like most great things, you must cultivate a taste for them.

Nurture your mind with great thoughts, for you will never go any higher than you think.

Action may not always bring happiness; but there is no happiness without action.

Courage is fire, and bullying is smoke.

One secret of success in life is for a man to be ready for his opportunity when it comes.

Time is precious, but truth is more precious than time.

Never complain and never explain.

Finality is not the language of politics.

Yakka foob mog. Grug pubbawup zink wattoom gazork. Chumble spuzz. I love loopholes.

America must listen. It must listen to the interests of others. But the US government has no interest in similarities, no matter how obvious.

Good managements produce a good average market price, and bad managements produce bad market prices.

Just get out your magic pencil and erase the cloudy skies, and just draw a picture of me saying, I apologize.

Science is what scientists do, not what nonscientists think they do or ought to be doing. Wetenschap is wat wetenschappers doen.

I believe God did create the world. And I think we're finding out more and more and more as to how it actually happened.

Well arranged time is the surest mark of a well arranged mind

The second greatest pleasure after love is talking about it.

Vultures are homely, but they clean up all the garbage and that's good. And they're elegant in the sky.

Telling a writer to relax is like telling a man to relax while being prodded for a possible hernia.