Quote by St. Mark the Ascetic ~ Pride

Guard your mind from self-praise and flee a high opinion of yourself, so that God does not allow you to fall into the opposite [passion to the virtue for which you boast], for man does not accomplish virtue alone, but with the help of God who sees all.


(St. Mark the Ascetic, Homilies, 85)



Source:

http://orthodox.cn/patristics/300sayings_en.htm