Shaikh Mirza Mazhar Jan-e-Janaa shaheed (Allah have mercy on him) said,

‘An individual must be aware of his own real worth. This is necessary so that he is not elated by someone’s praise or disappointed by another’s criticism. 

The cause of an individual’s resentment and displeasure is most of the time being unaware of his own real worth and status. ‘

Meerza Mazhar Jan-e-Janaa aur unka Urdu kalam, p 163