Shaykh Muhammad ibn Saalih al ‘Uthaymeen rahimahullaah comments:
Beware of the disease of the tyrants – and it is kibr (pride). And the Prophet sall Allaahu ‘alaihi wa sallam explained it in the best manner, and it was that pride is arrogance towards the Truth and belittling the people – meaning looking down upon them and having disdain for them…
(And know that) your behaving in an insolent manner towards your teacher is pride. And this behaving in an insolent manner might be upon the tongue and it might be also through being irritable and agitated. A person may be walking along with his teacher whilst strutting in a cocky manner, saying “I did such-and such and I did such-and-such.”
And likewise pride is having aversion towards the person who benefits you from those people who are lesser than you; and this also occurs from some of the students when someone lesser than them in knowledge informs them of something, they have an aversion (to this) and they do not accept it.
(Sharh hilyah taalib il ‘ilm p28 – 29 of Shaykh Muhammad ibn Saalih al ‘Uthaymeen rahimahullaah, translated by Nasser ibn Najam )