Sin is never at a stay; if we do not retreat from it, we shall advance in it; and the farther on we go, the more we have to come back.

None are too wise to be mistaken, but few are so wisely just as to acknowledge and correct their mistakes, and especially the mistakes of prejudice.

It is safe to make a choice of your thoughts, scarcely ever safe to express them all.

He that loveth a book will never want a faithful friend, a wholesome counsellor, a cheerful companion, an effectual comforter. By study, by reading, by thinking, one may innocently divert and pleasantly entertain himself, as in all weathers, so in all fortunes.

It is a fair adornment of a man and a great convenience both to himself and to all those with whom he converses and deals, to act uprightly, uniformly, and consistently. The practice of piety frees a man from interior distraction and from irresolution in his mind, from duplicity or inconstancy in his character, and from confusion in his proceedings, and consequently securing for others freedom from deception and disappointment in their transactions with him.

Wherefore for the public interest and benefit of human society it is requisite that the highest obligations possible should be laid upon the consciences of men.

Because Mathematicians frequently make use of Time, they ought to have a distinct idea of the meaning of that Word, otherwise they are Quacks.