"Keep yourself busy in remembering your faults, so that you have no time to remember the faults of others. Be sad on account of all the time you spent in the past in other than the pursuit of your Hereafter. Cry frequently for the wrongs you have committed in the past, and perhaps you will then be saved from them. Never tire or become bored of good deeds and of the people who perform them."
- Sufyan ath-Thawri