Who is so wise as to have a perfect knowledge of all things? Therefore trust not too much to thine own opinion, but be ready also to hear the opinion of others. Thought thine own opinion be good, yet if for the love of God thou foregoest it, and followest that of another, thou shalt the more profit thereby.
You are a man, not God; you are human, not an angel. How can you expect to remain always in a constant state of virtue, when this was not possible even for an angel of heaven, nor for the first man in the Garden?