The laziness of adolescence is a rehearsal for the incapacity of old age.

It is not important to have said a thing first, or best - or even most interestingly. What is important is to say it on the right occasion.

Many things which are called 'secrets' are only things withheld from people until they can understand or effectively experience them.

You need not wonder whether you should have an unreliable person as a friend. An unreliable person is nobody's friend.

... when we are talking about 'Christians' and 'Moslems' we must first make sure that we are talking about people who have an idea, which should be more or less correct, as to what the other is supposed to believe and what he is expected to do as a consequence of that belief.

Please, not again what you studied, how long you spent at it, how many books you wrote, what people thought of you - but: what did you learn?

The secret of Sufism is that it has no secret at all'.