Be careful how you do one man a pleasure which must needs occasion equal displeasure in another. For he who is thus slighted will not forget, but will think the offence to himself the greater in that another profits by it; while he who receives the pleasure will either not remember it, or will consider the favour done him less than it really was.
Other quotes by Francesco Guicciardini
Conspiracies, since they cannot be engaged in without the fellowship of others, are for that reason most perilous; for as most men are either fools or knaves, we run excessive risk in making such folk our companions.
I know no man who feels deeper disgust than I do at the ambition, avarice, and profligacy of the priesthood, as well because every one of these vices is odious in itself, as because each of them separately and all of them together are utterly abhorrent in men making profession of a life dedicated to God.