“A friend should always underestimate your virtues and an enemy overestimate your faults”
“Never underestimate your listener's intelligence, or overestimate you listener's information.”
“Never underestimate your power to change yourself; never overestimate your power to change others.”
“Love your enemies and hate your friends, your enemies remain the same your friends always change”
“The enemies of your enemies are not always your friends, but they can still be useful.”
“Always abandon your enemies,and never abandon your friends.”