The best way to destroy your enemies is to make them adopt your worldview

Keep quiet and the enemy will reveal himself.

Don't make the mistake of underestimating your enemies.

Don’t fight with your enemy’s brains, fight with his heart

You have enemies? Why, it is the story of every man who has done a great deed or created a new idea. It is the cloud which thunders around everything that shines. Fame must have enemies, as light must have gnats. Do no bother yourself about it; disdain. Keep your mind serene as you keep your life clear.

Not all things have to be scrutinized, nor all friends tested, not all enemies exposed and denounced