Hadhrat Thanvi (may Allah have mercy on him) said;

“It is permissible that you get angry with someone who commits a sin, but never think of them as being inferior to you. And if you are ever tasked with correcting someone’s behaviour, never think you are better than them. It is possible that they are like the prince and you are just the prince’s tutor. If the king orders the tutor to discipline the prince, it does not mean that the tutor has become superior to the prince.” (Infas-e-Essa)

“Those who are traversing the path of Tazkiyah (purification of inner-self) get afflicted by two types of spiritual illnesses. The first is Kibr (grandiosity, arrogance), and the second is excessive Tawazu’ (humility). Kibr is that if a person starts reciting some Tasbeehat, they start believing that they have become a great saint, if they start praying Salah they start looking down upon those who do not pray Salah. The treatment of this Kibr is to remind oneself that Kibr is one of the greatest sins and many a pious people lost their way because they had developed Kibr. Satan, who at one time was famous for his worship of Allah Ta’ala, was condemned for all eternity purely because of his Kibr.

(Unduly) Excessive Tawazu’ is that a person starts denigrating himself to the extent that he starts rubbishing his prayers, for example, people start saying things like they pray Salah but there is no Khushu’ (humbleness of heart) in it, they do Dhikr (remembrance) but do not get any spiritual benefit out of it, so their acts of worship are useless (Ma’az Allah). The treatment of this unduly excessive Tawazu’ is to say to Allah Ta’ala that ‘O Allah! I am extremely grateful to you that you have given me the motivation to pray Salah and do Dhikr. Otherwise, it was not my station to worship You without You allowing me to do so.”