By St. John Climacus
Those who wish to learn the will of the Lord must first mortify their own will. Then having prayed to God with faith and guileless simplicity, and having asked the fathers or even the brothers with humility of heart and no thought of doubt, they should accept their advice as from the mouth of God, even if their advice be contrary to their own view, and even if those consulted are not very spiritual. For God is not unjust, and will not lead astray souls who with faith and innocence humbly submit to the advice and judgment of their neighbor. Even if those who were asked were brute beasts, yet He who speaks is the Immaterial and Invisible One. Those who allow themselves to be guided by this rule without having any doubts are filled with great humility.
From The Ladder of Divine Ascent, Step 26:111)