In times of rapid change experience could be your worst enemy.

You know I think the film business is its own worst enemy because it sells movies on DVD footage and 'behind the scenes ' and now it's a real struggle trying to keep storylines and plotlines a secret.

I do not regret one professional enemy I have made. Any actor who doesn't dare to make an enemy should get out of the business.

It is easy enough to be friendly to one's friends. But to befriend the one who regards himself as your enemy is the quintessence of true religion. The other is mere business.

No enterprise is more likely to succeed than one concealed from the enemy until it is ripe for execution.

Man's wisdom is his best friend folly his worst enemy.

That's your best friend and your worst enemy - your own brain.

Your best friend and worst enemy are both in this room right now. It's not your neighbor right or left - and it's not God or the devil - it's you.

The best is the enemy of the good.

The best weapon against an enemy is another enemy.