Unlock your natural drives by doing what you enjoy.

Indeed, not all attacks-especially the bitter and ridiculing kind leveled at Darwin-are offered in good faith, but for practical purposes it is good policy to assume that they are.

Even after the greatest defeats, the depressing thought of being a failure is best combated by taking stock of all your past achievements.

The true scientist never loses the faculty of amazement.

Every stress leaves an indelible scar, and the organism pays for its survival after a stressful situation by becoming a little older.

Complete freedom from stress is death

To remain healthy a man must have some goal, some purpose in life that he can respect and be proud to work for.