S. Austin Allibone, comp. Prose Quotations from Socrates to Macaulay. 1880.
Levity
Quick wits be in desire new-fangled; in purpose, unconstant; light to promise anything, ready to forget everything, both benefit and injury, and thereby neither fast to friend nor fearful to foe.
I have seen so many woeful examples of the effect of levity, both that which arises from temper and that which is owing to interest, that a small degree of obstinacy is a quality not very odious in my eyes, whether it be complexioned, or from principle.
Edmund Burke: To the Duke of Richmond, Nov. 17, 1772.