For good ideas and true innovation, you need human interaction, conflict, argument, debate. Margaret Heffernan
Unhappy, let alone angry, religious people provide more persuasive arguments for atheism and secularism than do all the arguments of atheists. Dennis Prager
The truth is that killing innocent people is always wrong - and no argument or excuse, no matter how deeply believed, can ever make it right. No religion on earth condones the killing of innocent people; no faith tradition tolerates the random killing of our brothers and sisters on this earth. Feisal Abdul Rauf
Tolerance, openness to argument, openness to self-doubt, willingness to see other people's points of view - these are very liberal and enlightened values that people are right to hold, but we can't allow them to delude us to the point where we can't recognise people who are needlessly perpetrating human misery. Sam Harris
Silence is one of the hardest arguments to refute. Josh Billings