The Lord says, 'Whoever has, to him shall be given' (Mt. 13:12). He will give, then, to those who have; that is to say, if they use freely and cheerfully what they have received, He will add to and perfect His gifts.
A very weighty argument is this namely, that neither does the light which descends from thence, chiefly upon the world , mix itself with anything, nor admit of dirtiness or pollution, but remains entirely, and in all things that are, free from defilement, admixture, and suffering.
Although God is all powerful, He is unable to give more; though supremely wise, He knows not how to give more; though vastly rich, He has not more to give.
Did my infancy succeed another age of mine that dies before it? Was it that which I spent within my mother's womb?... And what before that life again, O God of my joy, was I anywhere or in any body?
If you should ask me what are the ways of God, I would tell you that the first is humility, the second is humility, and the third is humility. Not that there are no other precepts to give, but if humility does not preceed all that we do, our efforts are fruitless.
The same divine authority that forbids the killing of a human being establishes certain exceptions, as when God authorizes killing by a general law or when He gives an explicit commission to an individual for a limited time.