It is an end with priests and gods, if man becomes scientific. Moral: science is the thing forbidden in itself - it alone is forbidden. Science is the first sin, the germ of all sin, original sin. This alones is mortality: Thou shalt not know.
An illustrational form tells you through the intelligence immediately what the form is about, whereas a non-illustrational form works first upon sensation and then slowly leaks back into the fact.
And the first step, as you know, is always what matters most, particularly when we are dealing with those who are young and tender. That is the time when they are taking shape and when any impression we choose to make leaves a permanent mark.
The fact that we can become accustomed to anything, however disgusting at first, makes it necessary to examine carefully everything we have become accustomed to.