Fanaticism is the child of false zeal and of superstition, the father of intolerance and of persecution.
Fanatics can justify any atrocity to themselves. The ends can always justify the means.
The fanaticism which discards ethical considerations in favor of blind devotion can lead to dark places.
Fanaticism is the danger of the world. It always has been and has done untold mischief.
Fanaticism is the child of false zeal and superstition, the father of intolerance and persecution.