Qaasim al-Joo’ee said:

"I advise you with five matters:

1. When you are treated unjustly, do not behave unjustly.
2. when you are praised do not become happy.
3. when you are criticised, do not become upset.
4. when you are not believed, do not become angry.
5. If the people act deceitfully towards you, do not act deceitfully towards them.”

Related by Ibn al-Jawzee in Sifatus-Safwaa, 2/200. (via ittibaa)