My last will and testament to you my dear son is not to lose, God forbid, the opportunity. Strive to rectify your morals and behavior even though you may suffer pain and austerity. Diminish your interest in the ephemeral world, select the two-way road you may encounter, one leading to the Truth, shun falsehood, and expel the Satan out of yourself.
(Sahifeh-ye Imam, Vol. 16, P. 224)