For he lives twice who can at once employ The present well, and e'en the past enjoy. - Alexander Pope

Not louder shrieks to pitying heav'n are cast,
When husbands, or when lapdogs breathe their last;
Or when rich China vessels fall'n from high,
In glitt'ring dust and painted fragments lie! 160

And while self-love each jealous writer rules,
Contending wits become the sport of fools:
But still the worst with most regret commend,
For each ill author is as bad a friend.
To what base ends, and by what abject ways,
Are mortals urg'd through sacred lust of praise!
Ah ne'er so dire a thirst of glory boast,
Nor in the critic let the man be lost!
Good nature and good sense must ever join;
To err is human; to forgive, divine.

A man should never be ashamed to own that he has been in the wrong, which is but saying in other words that he is wiser today than he was yesterday.