Instead of taking care to acquaint ourselves with others, we only think of making ourselves known to them. It would be better to listen to other people in order to become enlightened rather than to speak so as to shine in front of them.

Self-love is almost always the ruling principle of our friendships. It makes us avoid all our obligations in unprofitable situations, and even causes us to forget our hostility towards our enemies when they become powerful enough to help us achieve fame or fortune.

Mean-spirited mediocrities, especially those with a smattering of learning, are the most likely to be opinionated. Only strong minds know how to correct their opinions and abandon a bad position.

In knowledge of human affairs, we should never allow our minds to be enslaved by others by subjecting ourselves to their whims. We must maintain freedom of thought, and never accept anything of purely human authority into our heads. When we are presented with a diversity of opinions, we must choose, if we can; if we cannot, we must remain in doubt.

There are people so blind and self-absorbed in all matters that they always believe that, whatever they desire or think, they can impose their will on other people. Whatever bad reason they use to persuade others, these self-centered people are so caught up in the process that it seems to them all they have to do is to speak their wishes in a lofty and commanding tone of voice in order to convince everybody.

We nearly always make ourselves masters of those whom we know well, because he who is thoroughly understood is in some sense subject to those who understand him.

Often our good deeds make enemies for us, and the ungrateful person despises us on two counts; for he is not only unwilling to acknowledge the gratitude he owes us: he does not want to have his benefactor as witness to his thankless behavior.