This gift... which God gave us in order to enable us to perfect ourselves, to learn and to teach, must not be employed in doing that which is for us most degrading and perfectly disgraceful... Those who employ the faculty of thinking and speaking in the service of that sense which is no honour to us, who think more than necessary of drink and love, or even sing of these things; they employ and use the divine gift in acts of rebellion against the Giver, and in transgression of his commandments.

Ch.8 - Guide for the Perplexed (c. 1190) - Part III