Those who say, "I was his friend and he was my friend but now we are not friends any more", should realize that they have never been friends. It was a presumption on their part, a false impression. Can friendship be such a false thing, can gold be gold at one time and not at another? Gold is gold, it never changes, it remains the same. Constancy in friendship is the soul of friendship. And that custom whereby a friend writes to another "Yours as always" is wrong. If a plant remains as it has always been, it does not grow, and that which does not grow is not living, and that which is not living is dead.