Hate the sin and love the sinner. Traditional saying - not first said by him.

Falling in love is not at all the most stupid thing that people do — but gravitation cannot be held responsible for it. Jotted (in German) on the margins of a letter to him (1933).

Get not your friends by bare compliments, but by giving them sensible tokens of your love.

You can't be wise and in love at the same time.

Whenever you are confronted with an opponent, conquer him with love.

Love has nothing to do with what you are expecting to get - only with what you are expecting to give - which is everything.

When I despair, I remember that all through history the way of truth and love has always won. There have been tyrants and murderers and for a time they seem invincible, but in the end, they always fall - think of it, always.

Children, all your life, you will be faced with a choice. You can choose love or hate... I choose love.

The man of knowledge must be able not only to love his enemies but also to hate his friends.

If you want to be loved, be lovable.