A method of solution is perfect if we can foresee from the start, and even prove, that following that method we shall attain our aim.

The real challenge is not growing more, but growing better with fewer resources.

Today is cruel, tomorrow is crueler, and the day after tomorrow is beautiful, but most people die tomorrow night, so don't give up today.

The truth is not always probable, or likely.

And your friends will be properly astonished to see you laughing as you look up at the sky! Then you will say to them, "Yes, the stars always make me laugh!"

Profit and purpose are not opposites—they're the twin engines of 21st century business.