Sufyan al-Thawri quotes:

We met a people who loved it when it was said to them "Fear Allah the most high!". Today you find people become annoyed at this.

Every act of disobedience committed due to passion, its forgiveness is hoped for. Every act of disobedience committed due to arrogance, its forgiveness is not hoped for because the root of Satan's disobedience was arrogance, whereas the root of Adam's lapse was passion.

If Shaytan(Demon) defeated me yesterday, I will defeat him today with repentance and good deeds

Knowledge knocks on the door of action. If it receives a reply, it stays. Otherwise, it departs.

None in this age will amass wealth except those having five traits ofcharacter. High hopes; abnormal greediness; excessive miserliness, lack of fearing Allaah; and forgetfulness of the coming world.

Acquaint yourself with fewer people, and as a result, you will backbite less frequently.

Do not become angry and furious.... for those two emotions lead to wickedness, and wickedness leads to the Hellfire.

If someone remarks "What an excellent man you are!" and this pleases you more than his saying, "What a bad man you are!" know that you are still a bad man.

If you know yourself, then you'll not be harmed by what is said about you.

Knowledge for us means knowledge of the allowance/dispensation (rukhsa). As for strictness, anyone can show strictness.

There is nothing more difficult for me to correct than my intentions, for it continually attempts to change.