Peter erred in life and in doctrine. Paul might have dismissed Peter's error as a matter of no consequence. But Paul saw that Peter's error would lead to the damage of the whole Church unless it were corrected. Therefore he withstood Peter to his face. The Church, Peter, the apostles, angels from heaven, are not to be heard unless they teach the genuine Word of God.

O, this faith is a living, busy, active, powerful thing! It is impossible that it should not be ceaselessly doing that which is good. It does not even ask whether good works should be done; but before the question can be asked, it has done them, and it is constantly engaged in doing them. But he who does not do such works, is a man without faith. He gropes and casts about him to find faith and good works, not knowing what either of them is, and yet prattles and idly multiplies words about faith and good works.

Though we be active in the battle, if we are not fighting where the battle is the hottest, we are traitors to the cause.

Pray, and let God worry.

It is neither safe nor prudent to do anything against conscience.

... we must drive them [Jews] out like mad dogs, so that we do not become partakers of their abominable blasphemy and all the their other vices and thus merit God's wrath and be damned with them.

The Holy Ghost has called me by the gospel and illuminated me with his gifts and sanctified and preserved me in the true faith.