For from the error of not knowing, or understanding, what sin is, there necessarily arises another error, that people cannot know or understand what grace is.

Idiots, the lame, the blind, the dumb, are men in whom the devils have established themselves: and all the physicians who heal these infirmities, as though they proceeded from natural causes, are ignorant blockheads.

God's mark is on everything that obeys Him.

The devil is not only a liar, but also a murderer, he constantly seeks our life, and wreaks his anger whenever he can afflict our bodies with misfortune and harm. Hence it comes that he often breaks men's necks or drives them to insanity, drowns some, and incites many to commit suicide, and to many other terrible calamities. Therefore there is nothing for us to do upon earth but to pray against this arch enemy without ceasing. For unless God preserved us, we would not be safe from him even for an hour.

The truth of the matter is rather as Christ says, "He who is not with me is against me." ... He does not say "He who is not with me is not against me either, but merely neutral.

God can be found only in suffering and the cross.

Works indeed are good, and God strictly requires them of us, but they do not make us holy.