Those actually are two very different questions. Belief in the Supreme Being, and belief in Jesus as Lord takes two different kinds of beliefs. I believe that logic demands that I believe in a Supreme Being. I think it is a scientific fact that there is a God, and I think you can prove that. You can use logic to prove things.
Logic is a science.
There s a lot of proof, but the classic proof is what the theologians call causality the argument of cause and effect. They trace the cause of all things and anything back to find the first cause that was uncaused, and that s God. Well, maybe the baseball was just in the universe, and it came through my window. No, you ll find Zachary, and that s where the ball came from. Well, find his mom and dad.