“A man with no enemies is no good as a friend.”
“It is a good man who stands up for his friends, but an honorable man who stands up for his enemies.”
“I can be a good friend, or a bad enemy.”
“To be a friend of the earth, you have to be an enemy of man.”
“Memory is man's greatest friend and worst enemy.”
“He is many things - dangerous and devious, cunning and deadly, a good friend and an implacable enemy - but he comes from an age when a man's word was indeed precious.”