It is a crime to put a Roman citizen in chains, it is an enormity to flog one, sheer murder to slay one: what, then, shall I say of crucifixion? It is impossible to find the word for such an abomination.
Everything has its price - and if that price is not paid, not that thing but something else is obtained... it is impossible to get anything without this price.
No state at war with another state should engage in hostilities of such a kind as to render mutual confidence impossible when peace will have been made.