Science can prove physical things but not spiritual things.
St Thomas Aquinas, spoke of five ways in which a believer can "figure out" that there is a god.
1- motion: the universe is constantly moving, changing every instant and going on to what it will become in the next instant. There must be a first mover who set off this universal motion.
2. Cause: Every effect has a cause. There must be something that caused the existance of the universe.
3. Necessary: Everything in creation is possible, but there must be one who is necessary to the universe for its possibilities to unfold.
4. perfection: Human beings seek perfection in everything. There must be one who is perfect for human beings to seek it.
5. Pattern: The universe works so well, and has such an inner pattern or design that there must be one great intelligence that designed it.
The astronaut John Glenn, spoke of the way in which his travels in space had confirmed his belief in God.
"Galaxies, millions of light years across, all travelling in prescibed orbits in relation to one another. Could all of this have just happened? was this an accident that some flotsam and jetsam, and it suddenly started making these orbits of its own accord? I can't believe that's really true. I think this was a definite plan. This is one thing in space that shows me there is a god, some power that put all this into orbit and keeps it there. It wasn't just an accident"
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Evanescence