"The electron can no longer be conceived as a single, small granule of electricity; it must be associated with a wave, and this wave is no myth; its wavelength can be measured and its interferences predicted."

"Focus on your problem zones, your strength, your energy, your flexibility and all the rest. Maybe your chest is flabby or your hips or waist need toning. Also, you should change your program every thirty days. That's the key."

"Nature teaches us a valuable lesson: every challenge is an invitation to grow stronger."

"If wrinkles must be written on our brows, let them not be written upon the heart. The spirit should never grow old."

"I've never been someone who's very prone to boredom. I don't know, boredom seems like something you should grow out of at about 15 or 16. There's so much that needs to be done."