Cure yourself of the inclination to bother about how you look to other people. Be concerned only . . . with the idea God has of you.
Chemistry ought to be not for chemists alone.
The greatest height of heroism to which an individual, like a people, can attain is to know how to face ridicule.
Life is doubt, and faith without doubt is nothing but death.
To love with the spirit is to pity, and he who pities most loves most.
The truth is that reason is the enemy of life.