I came across this text recently, written in my hand in the front of one of my older Bibles. It is a passage from Lazarus by Morris West (published by Heinemann in 1990; page 107):
This is why we must never be afraid to speculate - and never, never be afraid of those who urge us to contemplate the seemingly impossible, to examine ancient formulae for new meanings. Believe me, we are more readily betrayed by our certainties than by our doubts and curiosities. I believe that half the heresies and schisms would never have happened if Christians had been willing to listen to each other in patience and charity, and not tried to turn the Divine mysteries into geometric theories ..."
I still agree with West's comment.