Enemy Adversary Foe Nemesis

The enemies you make by taking a decided stand generally have more respect for you than the friends you make by being on the fence - Anonymous

Unthinking respect for authority is the greatest enemy of truth - Albert Einstein

Always forgive your enemies - nothing annoys them so much - Oscar Wilde

In the End, we will remember not the words of our enemies, but the silence of our friends - Martin Luther King, Jr.

Love your enemies just in case your friends turn out to be bastards- Anonymous (ammusingly true)

Misfortune tests friends, and detects enemies - Anonymous

The wise benefit more from their enemies than fools from their friends - Proverb

There is no such thing as an insignificant enemy - French proverb

Just as one is judged by the friends one keeps; one is also judged by the enemies one makes - M.L.R.O.