Remember that whatever knowledge you do not solidly lay the foundation of before you are eighteen, you will never be master of while you breathe.

We are as often duped by diffidence as by confidence.

A man of sense only trifles with them, plays with them, humors and flatters them, as he does with a sprightly and forward child; but he neither consults them about, nor trusts them with, serious matters.

Aim at perfection in everything, though in most things it is unattainable. However, they who aim at it, and persevere, will come much nearer to it than those whose laziness and despondency make them give it up as unattainable.

Whoever is in a hurry shows that the thing he is about is too big for him.

Men are apt to mistake, or at least to seem to mistake, their own talents, in hopes, perhaps, of misleading others to allow them that which they are conscious they do not possess. Thus lord Hardwicke valued himself more upon being a great minister of state, which he certainly was not, than upon being a great magistrate, which he certainly was.

I am not of the opinion generally entertained in this country [England], that man lives by Greek and Latin alone; that is, by knowing a great many words of two dead languages, which nobody living knows perfectly, and which are of no use in the common intercourse of life. Useful knowledge, in my opinion, consists of modern languages, history, and geography; some Latin may be thrown into the bargain, in compliance with custom, and for closet amusement.