The fool folds his hands together, and eats his own flesh.

Permit not your mouth to cause your flesh to sin; neither say before the angel, that it was an error: why should God be angry at your voice, and destroy the work of your hands?

Therefore remove sorrow from your heart, and put away evil from your flesh: for childhood and youth are vanity.

And further, my son, be admonished by these: of making many books there is no end; and much study is a weariness of the flesh.