"There are some who desire knowledge merely for its own sake; and that is shameful curiosity. And there are others who desire to know, in order that they may themselves be known; and that is vanity, disgraceful too. Others again desire knowledge in order to acquire money or preferment by it; that too is a discreditable quest. But there are also some who desire knowledge, that they may build up the souls of others with it; and that is charity. Others, again, desire it that they may themselves be built up thereby; and that is prudence. Of all these types, only the last two put knowledge to the right use" (St. Bernard, Sermon on the Canticle of Canticles).