"智者以理指教，中者以经验，愚者以必需，畜者以本能。"

“I put my heart & soul into my work, & have lost my mind in the process.”

“The one unchangeable certainty is that nothing is certain or unchangeable”

“What you get by achieving your goals is not as important as what you become by achieving your goals”

“A friend to all is a friend to none.”

“Training for me is a metaphor for life, period. The dedication, the determination, the des...”

“Integrity is doing the right thing, even when no one is watching”

“Luck is what happens when preparation meets opportunity”

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

“The beginning is perhaps more difficult than anything else, but keep heart, it will turn o...”

“Man suffers only because he takes seriously what the gods made for fun.”

“If you're not stubborn, you'll give up on experiments too soon.”

“I’m not arrogant enough to look back on my career and criticize my choices It’s really...”