Abraham ben Moses ben Maimon, aka Rabbi Avraham Maimuni, aka Rabbeinu Avraham ben ha-Rambam

Strive to not become dependent on the pleasures of the world.

Anger an arrogance are partners. Inner feelings of conceit lead a person to become angry. Conversely, humility leads to forgiveness.

Be careful not to consider yourself wicked. A person who considers himself wicked will not try to improve and is likely to become worse than he is now.

Do not yearn for any other situation in the world besides the one you actually find yourself in.

Once you are used to something, you feel some suffering if you lack it. Be very careful before making something a habit.