"One can have no smaller or greater mastery than mastery of oneself."

"Nature never breaks her own laws."

"He who possesses most must be most afraid of loss."

"Life is pretty simple: You do some stuff. Most of it doesn't work. If it doesn't work, you do something else. The thing that works, you do more of."

"I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do."