563. It is known that habit is a second nature, and that therefore what is easy for one is difficult for another; and this is true of self-examination and a confession of what is thereby discovered. What is easier for a hired laborer, a porter, or a farmer, than to work with his hands from morning till evening, while a gentleman or a delicate person could not do the same work for half an hour without fatigue and sweating? It is easy for a footman with a staff and easy boots to pursue his way for miles, while one accustomed to ride can hardly run slowly from one street to another. Every mechanic who is attentive to his task goes through it easily and willingly, and when he leaves it, longs to return; while another, who understands the same trade, but is indolent, can scarcely be driven to work. The same is true of everyone, whatever may be his office or pursuit. To one diligent in piety, what is easier than to pray to God? while to one who is a slave to impiety, what is more difficult, and vice versa? What priest, preaching before a king for the first time, does not feel timid? but after doing it frequently he goes through boldly. What is easier for an angelic man than to raise his eyes to heaven, or for a devilish man than to cast them down toward hell? But if the latter becomes a hypocrite, he too can look up to heaven, but his heart is turned away. Everyone becomes imbued with the end he has in view and the habit arising therefrom.