The Sayings of the Holy Desert Fathers

"One of the brothers asked Abba Poemen, saying, "Father, what will I do in the matter of my sins?" The old man said to him, " Whosoever wishes to blot out his offences can do so by weeping, and he who wishes to acquire good works can do so by means of weeping; for weeping is the path which the Scriptures have taught us, and the fathers have also wept continually, and there is no other path except that of tears." 

And the same old man (i.e., Poemen) said, "There are two things [to remember] : We must fear our Lord, and do good to our neighbour."

-The Sayings of the Holy Desert Fathers (pg. 46)