Be modest; adopt humility. You cannot say anything about yourself with certainty until Allah exonerates you on the Last Day and accepts your good deeds. If He were to reject you, who shall be more contemptible than yourself? What could be more foolish than to consider yourself superior to fellow criminals in the prison that this world is! Until the Lord of the Day of Judgment pronounces His verdict, consider every Muslim better than yourself. Keep your gaze on the virtue of others, not on their shortcomings. Only mention their good points, not the bad ones. At the same time, do not go about openly announcing your own faults or disparaging your own self. Be humble and modest in your manner of living and conduct before Allah as if you are an abject and degraded slave. Do not raise your voice like an ass. Do not display arrogance. What a folly it is to be haughty over your body which is destined to turn into pus and become a meal of insects and germs!
"Dying and Living for Allah" - Khurram Murad, pp. 51, 52