If God is, why is there evil? But if God is not, why is there good?

The law detects, grace alone conquers sin.

Furthermore, what profit was it to me that I, rascally slave of selfish ambitions that I was, read and understood by myself as many books as I could get concerning the so-called liberal arts?...I had turned my back to the light and my face to the things it illuminated, and so no light played upon my own face, or on the eyes that perceived them.

Human law cannot punish or forbid all evil, since while doing away with evils it would do away with many good things, which would hinder the advance of the common good.

It is the function of perfection to make one know one's imperfection.

What you see is the bread and the chalice; that is what your own eyes report to you. But what your faith obliges you to accept is that the bread is the body of Christ and the chalice is the blood of Christ. This has been said very briefly, which may perhaps be sufficient for faith; yet faith does not desire instruction

We must understand then, that even though God doesn't always give us what we want, He always gives us what we need for our salvation.