God has bestowed upon you intelligence and knowledge. Do not extinguish the lamp of Divine Grace and do not let the candle of wisdom die out in the darkness of lust and error. For a wise man approaches with his torch to light up the path of mankind.
Whoever would be a teacher of men let him begin by teaching himself before teaching others; and let him teach by example before teaching by word. For he who teaches himself and rectifies his own ways is more deserving of respect and reverence than he who would teach others and rectify their ways.
And when one of you falls down he falls for those behind him, a caution against the stumbling stone. Ay, and he falls for those ahead of him, who though faster and surer of foot, yet removed not the stumbling stone.