Do not be guilty of possessing a library of learned books while lacking learning yourself. - Erasmus

Whatever you see in the more material part of yourself, learn to refer to God and to the invisible part of yourself. In that way, whatever offers itself to the senses will become for you an occasion for the practice of piety.

I consider as lovers of books not those who keep their books hidden in their store-chests and never handle them, but those who, by nightly as well as daily use thumb them, batter them, wear them out, who fill out all the margins with annotations of many kinds, and who prefer the marks of a fault they have erased to a neat copy full of faults.

There are monasteries where there is no discipline, and which are worse than brothels — ut prae his lupanaria sint et magis sobria et magis pudica. There are others where religion is nothing but ritual; and these are worse than the first, for the Spirit of God is not in them, and they are inflated with self-righteousness. There are those, again, where the brethren are so sick of the imposture that they keep it up only to deceive the vulgar. The houses are rare indeed where the rule is seriously observed, and even in these few, if you look to the bottom, you will find small sincerity. But there is craft, and plenty of it — craft enough to impose on mature men, not to say innocent boys; and this is called profession. Suppose a house where all is as it ought to be, you have no security that it will continue so. A good superior may be followed by a fool or a tyrant, or an infected brother may introduce a moral plague. True, in extreme cases a monk may change his house, or even may change his order, but leave is rarely given. There is always a suspicion of something wrong, and on the least complaint such a person is sent back.