“I don’t count my sit-ups; I only start counting when it starts hurting because they’re the only ones that count.”

“You can't produce a baby in one month by getting nine women pregnant”

“Success does not consist in never making mistakes but in never making the same one a second time”

“When something is important enough, you do it even if the odds are not in your favor.”

“All you have to do is pay attention: lessons always arrive when you are ready.”

“The voice of the intellect is a soft one, but it does not rest until it has gained a hearing.”

“You need to fail in order to find the right solution”

“The best thinking has been done in solitude The worst has been done in turmoil”

“Have no fear of perfection - you'll never reach it.”

“I like the challenge of trying different things and wondering whether it’s going to work...”

“The opportunity of defeating the enemy is provided by the enemy himself.”

“No one can continually insult you or hurt your feelings without your permission.”

“Any product that needs a manual to work is broken.”