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

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

To be totally without stress is to be dead.

Leaders are leaders only as long as they have the respect and loyalty of their followers.

The element of chance in basic research is overrated. Chance is a lady who smiles only upon those few who know how to make her smile.

The true scientist never loses the faculty of amazement.

Almost no germ is unconditionally dangerous to man; its disease-producing ability depends upon the body's resistance.