Shadow is the diminution alike of light and of darkness, and stands between darkness and light. - Leonardo da Vinci

Darkness is absence of light. Shadow is diminution of light.

He who offends others, does not secure himself.

We see the most striking example of humility in the lamb which will submit to any animal; and when they are given for food to imprisoned lions they are as gentle to them as to their own mother, so that very often it has been seen that the lions forbear to kill them.

For I know that there are numberless people who, in order to gratify one of their appetites, would destroy God and the whole of the universe. If this art has never remained among men, although so necessary to them, it never existed, and never will exist.