Insistence on truth can come into play when one party practices untruth or injustice. Only then can love be tested. True friendship is put to the test only when one party disregards the obligation of friendship.
I think it is wrong to expect certainties in this world, where all else but God that is Truth is an uncertainty. All that appears and happens about and around us is uncertain, transient. But there is a Supreme Being hidden therein as a Certainty, and one would be blessed if one could catch a glimpse of that Certainty and hitch one's waggon to it. The quest for that Truth is the summum bonum of life.
Fear has its use, but cowardice has none. I may not put my finger into the jaws of a snake, but the very sight of the snake need not strike terror into me.
Constant development is the law of life, and a man who always tries to maintain his dogmas in order to appear consistent drives himself into a false position.