If forgers and malefactors are put to death by the secular power there is much more reason for excommunicating and even putting to death one convicted of heresy.
There is nothing on this earth more to be prized than true friendship.
Faith has to do with things that are not seen and hope with things that are not at hand.
Every judgement of conscience, be it right or wrong, be it about things evil in themselves or morally indifferent, is obligatory in such wise that he who acts against his conscience always sins.
Good can exist without evil, whereas evil cannot exist without good.