Here's my take on this: God's existence cannot be prove by science as true or false. Talking about science, we know that if something existed then someone created it , Creator and creation. Enginners created engines, Bakers created cakes/bread, Bees created honey, all things here on earth is based on that logic. So, those who believe in God also states the same, if Life existed then there should be a creator. Now outside of planet earth, the outer space is a vast area that needed an explanation, What does God plan on a very enormous universe? By the way, Big Bang is not the theory of beginnings, but an expansion event. Well, it is also possible na universe really is a thing that existed first without any creator then it is expanding on its own. So in short: hindi ko alam san lulugar, but naniniwala talaga ako na may Diyos, not on a religion-based though.
If You Can Feel That The Holy Trinity Is With You, May The People Who Don't Believe in God See What The Holy Trinity Is Doing For Them (Ex. Safe Travel, Waking Up Everyday, Miracles Which Science and Others Can't Explain) Though We Can't Force Someone to Believe Us That God Really Exist Still We Can Help Them To Realize That God Exist Even Though In Present We Can't See Him Still His Presence Is Strong That He Really Exist And Guiding Us In The Right Path 
PH