For this reason, we should, with all our strength, guide ourselves toward God's will and not trust in our own heart. Even if there is a good thing to be done, but we have testimony of some saint that it is not good, we must on the one hand hold that which is good, but on the other, not trust in our ability to perform it properly in the way it should be done. We must do all that we can, but at the same time, ask advice as how to do it. After we have done it, we should ask if we have done it well, and even when we act thus must not be carefree but await the judgment of God. As the saintly man, Abba Agathon said, when he was asked, "Are even you afraid, father?" He replied, "I have done what I could but I do not know if my work pleased God. God's judgment is one thing, and man's is another." May God shelter us from danger of guiding ourselves, and make us worthy of our fathers.
Source: Daily Lives, Miracles, and Wisdom of the Saints and Fasting Calendar
Contributed by: boyznamedsue