The student of knowledge is exposed to four spiritual diseases that he has to battle.

The first is jealousy, and this is directed towards your peers.

It comes from your own insecurities, your diseased heart – because you aren’t content with what Allah (subhanahu wa ta’ala) has given you.

Jealousy is avoided by appreciating Allah’s wisdom in that Allah chooses what to give to whom, so put your trust in him.

Anytime you are jealous of another person in a bad way, know that you have challenged Allah’s wisdom.

The second of them is Showing off: he mentioned jealousy before it (the first one) because the beginning student of knowledge is unable to show off before he is able to be jealous.