“Nobody grows old merely by living a number of years. We grow old by deserting our ideals. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul”

“My health may be better preserved if I exert myself less, but in the end doesn't each person give his life for his calling?”

“If you cannot work with love but only with distaste, it is better that you should leave your work. ”

“Skill is the unified force of experience, intellect and passion in their operation”

“Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.”

“While one finds company in himself and his pursuits, he cannot feel old, no matter what his years may be”