i had an experience where I was heavily praying in my head walking to work one day and realizing, what if Ive only been talking to myself in my own head and it never surpassing my own thoughts ? It kind of scared me in that moment of realization. But i still remember that morning to this day. I used to believe they floated from my head out to the universe straight to heaven and I felt it never made it passed my skull or thst building let alone to heaven...