I fully trust in the process of life

Under a cast, a bone heals invisibly and on its own timetable, and no amount of anxiety from the person attached to it speeds up the calcium. You can't check. You can only wait and keep weight off it.

Trust of that kind isn't optimism. It's recognizing that some processes are already underway and don't need supervision to continue.

Complete trust is a lot to ask on a bad week. Partial is fine, and mostly what's on offer: enough to stop relitigating a decision at two in the morning, enough to let a slow month be slow. The process doesn't require your belief. It's just easier to live alongside if you aren't fighting it.