Man is very well defended against himself... The actual fortress is inaccessible, even invisible to him, unless his friends and enemies play the traitor and conduct him in by a secret path.

How much reverence has a noble man for his enemies!-and such reverence is a bridge to love. For he desires his enemy for himself, as his mark of distinction; he can endure no other enemy than one in whom there is nothing to despise and very much to honor!

The most constant, the most powerful, and the most generous of all my enemies [Britain].

My enemies make appointments at my tomb.

My enemies are many, my equals are none.

Friends must always be treated as if one day they might be enemies.