Ugliness is a letter of credit for some special purposes.

There is nothing so necessary, but at the same time there is nothing more difficult (I know it by experience) for you young fellows, than to know how to behave yourselves prudently towards those whom you do not like. Your passions are warm, and your heads are light; you hate all those who oppose your views, either of ambition or love; and a rival, in either, is almost a synonymous term for any enemy.

You must look into people, as well as at them.

A seeming ignorance is very often a most necessary part of worldly knowledge. It is, for instance, commonly advisable to seem ignorant of what people offer to tell you; and when they say, Have not you heard of such a thing? to answer No, and to let them go on, though you know it already.

If you love music hear it; go to operas, concerts, and pay fiddlers to play to you; but I insist upon your neither piping nor fiddling yourself. It puts a gentleman in a very frivolous, contemptible light; brings him into a great deal of bad company; and takes up a great deal of time, which might be much better employed.

I have been too long acquainted with human nature to have great regard for human testimony; and a very great degree of probability, supported by various concurrent circumstances, conspiring in one point, will have much greater weight with me, than human testimony upon oath, or even upon honour; both of which I have frequently seen considerably warped by private views.

There never were, since the creation of the world, two cases exactly parallel.