“What pillow can one have like a good conscience?”

“...You can only subject people to anguish who have a conscience. You can only punish people who have hopes to frustrate or attachments to sever; who worry what you think of them. You can really only punish people who are already a little bit good.”

“The wicked fear the good, because the good are a constant reproach to their consciences. The ungodly like religion in the same way that they like lions, either dead or behind bars; they fear religion when it breaks loose and begins to challenge their consciences.”

“There are no buts, my son. True there are degrees of honor — but one man can have only one code. Do what you like. It's your choice. Some things a man must decide for himself. Sometimes you have to adapt to circumstances. But for the love of God guard yourself and your conscience — no one else will — and know that a bad decision at the right time can destroy you far more surely than any bullet!”

“the safest course is to do nothing against one's conscience. With this secret, we can enjoy life and have no fear from death.”

“A good conscience is a continual feast, but a galled conscience is as great a torment as can possibly happen, a still baking oven (so Pierius in his Hieroglyph compares it), another hell.”