From time to time, I go to this site with badly translated Hafez poetry, to read my fortune. You fix your question, then in theory look at a random page and line of poetry, and there is your question answered.
Tonight I did that. I won’t quote it, but will paraphrase the line: “Pain is recondite wisdom. Persevere and that wisdom will emerge into the light.”
This is, in my view, a useful belief.
I will add that, quite frequently, as a Pragmatist, I conflate true and useful. If it achieves the desired end, then it WAS true, correct? It may not be true for the next person, who lacks belief, but contingently, it was good enough.