Rational Thought
Do you tie your shoes down in case gravity stops working while you sleep?
If gravity suddenly stopped working then your shoes could float away. No one can prove that gravity will continue working. We can rationally conclude that gravity will continue working by applying rational thought to observations of reality. Such as: gravity has always been stable; geological formations show the continuing effects of gravity at all times; etc etc.
Similarly, no one can prove that God exists. However, we can rationally conclude that God exists by applying rational thought to observations of reality. Such as: the orderly existence of the universe; inanimate matter became living matter; The 19th century science of unguided evolution does not work with the scientific discoveries of 21st century science; etc etc.
If you are rational enough to not tie your shoes down in case gravity stops working while you sleep, then you are rational enough to accept the existence of God based on rational thought applied to observations of reality.
Freely think about it. :-)