Opposition is true friendship.

But most of us are apt to settle within ourselves that the man who blocks our way is odious, and not to mind causing him a little of the disgust which his personality excites in ourselves.

I love opposition that has convictions.

It is easy and dismally enervating to think of opposition as merely perverse or actually evil -- far more invigorating to see it as essential for honing the mind, and as a positive good in itself. For the day that moral issues cease to be fought over is the day the word "human" disappears from the race.