Between men and women there is no friendship possible. There is passion, enmity, worship, love, but no friendship. Lady Windermere's Fan (1892)
Laughter is not at all a bad beginning for a friendship, and it is far the best ending for one. The Picture of Dorian Gray (1891)
Anybody can sympathise with the sufferings of a friend, but it requires a very fine nature — it requires, in fact, the nature of a true Individualist — to sympathise with a friend's success. The Soul of Man under Socialism (1891)
Friendship is far more tragic than love. It lasts longer. A Few Maxims for the Instruction of the Over-Educated (1894)