NEVER PUT TOO MUCH TRUST IN FRIENDS, LEARN HOW TO USE ENEMIES

Be wary of friends - they will betray you more quickly, for they are easily aroused to envy. They also become spoiled and tyrannical. But hire a former enemy and he will be more loyal than a friend, because he has more to prove. In fact you have more to fear from friends than from enemies. If you have no enemies, find a way to make them.