Science rests on reason and experiment and can meet an opponent with calmness but a belief is always sensitive.

A scientific truth does not triumph by convincing its opponents and making them see the light but rather because its opponents eventually die and a new generation grows up that is familiar with it.

I even believe if you're killing a team you shouldn't stop. You should respect your opponents enough to play 100 percent the whole time. And by the same token if you're getting killed by the other team you should never quit.

Arsenal have won that advantage nobody gave it to them. By playing fantastic football and by winning matches and by winning trophies they won that respect that the opponent has for them.

Attacks on a politician's identity - questioning Romney's religion say or Obama's birthplace - tend to come when an opponent is desperate and can't sell himself.

Once upon a time my political opponents honored me as possessing the fabulous intellectual and economic power by which I created a worldwide depression all by myself.

I have never seen opponents so silent about their record and so desperate to keep their power.

The art of politics consists in knowing precisely when it is necessary to hit an opponent slightly below the belt.

Democrats always like to brag that their guys are smarter than the opponents and Republicans always like to brag that their guys are more moral than the opponents. But if you're looking for morals in politics you're looking for bananas in the cheese department.

A wise nation should cultivate a political spirit that allows opponents to cooperate without fearing an automatic execution from their core supporters. Who knew that the real rogues in American politics would be the ones who dare to get along?