If any friend desire thee to be his surety, give him a part of what thou hast to spare; if he press thee further, he is not thy friend at all, for friendship rather chooseth harm to itself than offereth it. If thou be bound for a stranger, thou art a fool; if for a merchant, thou puttest thy estate to learn to swim.
Walter RaleighAll histories do show, and wise politicians do hold it necessary that, for the well-governing of every Commonweal, it behoveth man to presuppose that all men are evil, and will declare themselves so to be when occasion is offered.
Walter Raleigh