If it's very painful for you to criticize your friends-you're safe in doing it. But if you take the slightest pleasure in it, that's the time to hold your tongue.
If we have not achieved our early dreams, we must either find new ones or see what we can salvage from the old. If we have accomplished what we set out to do in our youth, we need not weep like Alexander the Great that we have no more worlds to conquer.