"If the flag of an armed enemy of the U.S. is allowed to fly over government buildings, then it implies that slavery, or at least the threat of slavery, is sanctioned by that government and can still legally exist"

"Time is the friend of the wonderful company, the enemy of the mediocre"

"I don't know what effect these men will have upon the enemy, but, by God, they frighten me"

"Concentrated power has always been the enemy of liberty"

"In order to rally people, governments need enemies... if they do not have a real enemy, they will invent one in order to mobilize us"

"The best weapon against an enemy is another enemy"

"Man has no greater enemy than himself"

"The chief enemy of creativity is "good" sense"

"When the principles that run against your deepest convictions begin to win the day, then the battle is your calling, and peace has become sin. You must at the price of dearest peace lay your convictions bare before friend and enemy with all the fire of your faith"

"You can learn from anyone even your enemy"

"Tact is the art of making a point without making an enemy"