Using a negative thought for good — possible?

I was listening to Brooke’s coaching and she mentioned that unfortunately, we cannot control the universe. I felt at peace hearing that. But, it is negative, so I’m wondering if that’s helpful to believe? I tried thinking about alternative thoughts, such as “I accept uncertainty” but that seems less believable, and therefore less effective. “It’s not my job to control the universe” may work, but there’s also an acceptance there I’m not ready for. I somewhat like (need?) to mourn the fact that I (or anyone else) cannot control it to feel peace with it; almost like it’s okay that I’m that small because I can just focus on myself. That’s what I’m here to do. Does this make sense? Should I try to come up with something more positive or can negative thoughts occasionally free us?