One of many excellent quotes from Mike Mason's book on suffering (available on Kindle):
"Being a believer in the Lord is no guarantee against any sort of failure or disaster, including sickness, family breakdown, or complete mental collapse.
All God guarantees is that He will be with us and that ultimately we will be saved—and there are bound to come times when even on these promises He will appear to be reneging."
(Mason, Mike. The Gospel According to Job, p. 105)