The higher type of man clings to virtue, the lower type of man clings to material comfort. The higher type of man cherishes justice, the lower type of man cherishes the hope of favors to be received.
If I were travelling with two partners, one virtuous and one dishonest, both would be useful as teachers. I would perceive what's good of the first one and I would imitate him whereas I would try to correct in me the defects I may see in the second one.
Coarse rice to eat, water to drink, my bended arm for a pillow - therein is happiness. Wealth and rank attained through immoral means are nothing but drifting clouds.
Because the newer methods of treatment are good, it does not follow that the old ones were bad: for if our honorable and worshipful ancestors had not recovered from their ailments, you and I would not be here today.