I think God isn’t clearer a lot of the time is because we need to have faith. Knowing something from physical evidence and believing it isn’t really faith, it’s common sense or something along those lines. I think those times when we just aren’t sure are beneficial, bacause things like knowledge and feelings are finite. If two people know a secret, and they’re the only ones, and never tell it, once they die the knowledge dies with them. No one else will ever know. So too would those physical signs eventually die away. I mean, seriously! When people ask for more signs of God’s presence, they don’t look to His miracles in the Old Testament, or His creation all around us, or the simple divine mystery of Jesus’s life, birth, death, and resurrection. And even those physical signs don’t provide as much surety as you may think. God gave the Isrealites countless signs in the desert, and yet they turned from Him repeatedly, didn’t they? Many of us have proabably done the same: ignored the miracles that Gos has already/I given us, and forgetting Him.