I do not know if I have explained this clearly: self-knowledge is so important that, even if you were raised right up to the heavens, I should like you never to relax your cultivation of it; so long as we are on this earth, nothing matters more to us than humility. And so I repeat that it is a very good thing -- excellent, indeed -- to begin by entering the room where humility is acquired rather than by flying off to the other rooms. For that is the way to make progress, and, if we have a safe, level road to walk along, why should we desire wings to fly? Let us rather try to get the greatest possible profit out of walking. As I see it, we shall never succeed in knowing ourselves unless we seek to know God: let us think of His greatness and then come back to our own baseness; by looking at His purity we shall see our foulness; by meditating upon His humility, we shall see how far we are from being humble.