Overstraining is the enemy of accomplishment. Calm strength that arises from a deep and inexhaustible source is what brings success.

There's a long way to fall when you pretend that you're so far away from the earth, far away from reality, floating in a bubble that's protected by fame or success. It's scary, and it's the thing I fear the most: to be swallowed up by that bubble. It can be poison to you, fame.

A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do.

Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

The first requisite of success is the ability to apply your physical and mental energies to one problem without growing weary.

The key to success is emotional stability.