Nothing is more dangerous to one's own faith than the work of an apologist. No doctrine of that faith seems to me so spectral, so unreal as one that I have just successfully defended in a public debate.
A thing may be morally neutral and yet the desire for that thing may be dangerous.
The most dangerous ideas in a society are not the ones being argued, but the ones that are assumed.
The most dangerous thing you can do is to take any one impulse of your own nature and set it up as the thing you ought to follow at all costs.