It is almost as difficult to make a man unlearn his errors as his knowledge.

It is easier to pretend to be what you are not than to hide what you really are; but he that can accomplish both has little to learn in hypocrisy.

In all societies, it is advisable to associate if possible with the highest; not that the highest are always the best, but because, if disgusted there, we can descend at any time; but if we begin with the lowest, to ascend is impossible.

In the pursuit of knowledge, follow it wherever it is to be found; like fern, it is the produce of all climates, and like coin, its circulation is not restricted to any particular class.

Heaven may have happiness as utterly unknown to us as the gift of perfect vision would be to a man born blind. If we consider the inlets of pleasure from five senses only, we may be sure that the same Being who created us could have given us five hundred, if He had pleased.

The further we advance in knowledge, the more simplicity shall we discover in those primary rules that regulate all the apparently endless, complicated, and multiform operations of the Godhead.

When millions applaud you seriously ask yourself what harm you have done; and when they disapprove you, what good.