The essence of friendship is entireness, a total magnanimity and trust. It must not surmise or provide for infirmity. It treats its object as a god, that it might deify both.
No man is an island, entire of itself; every man is a piece of the continent, a part of the main. If a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as if a manor of thy friend's or of thine own were: any man's death diminishes me, because I am involved in mankind, and therefore never send to know for whom the bells tolls; it tolls for thee.
Good company requires only birth, education, and manners, and with regard to education is not very nice. Birth and good manners are essential; but a little learning is by no means a dangerous thing in good company; on the contrary, it will do very well.
I have always laid it down as a maxim -and found it justified by experience -that a man and a woman make far better friendships than can exist between two of the same sex -but then with the condition that they never have made or are to make love to each other.