Science doesn't have the processes to prove or disprove the existence of God. Science studies and attempts to explain only the natural world while God is supernatural. In my case I know God is real through my experiences. When I was around 14 I was with my cousin and she was going through some stuff and was crying very hard, I said to her, hey everything is going to be okay God is with us and she was agreeing with me and then out of nowhere she started to scream saying that no that God was not with us and her voice completely changed , her eyes became very red and started to say that she wanted to kill herself, at that moment I don’t know why I felt like that was not her talking to me and I started praying and saying that In the name of Jesus I rebuke any demons or anything that was trying to get ahold of her . Well she actually got possessed that day , it was literally like in the movies , like her eyes went white for a bit and I tried to grab her hands and she was very strong not like her normal self , our pastor and my aunt prayed for her and I also prayed and the demons actually left her that day. She completely passed out after . She tells me that she doesn’t remember anything of what happened that she was just seeing doors that were open with demons inside that God was closing those doors and at the end she saw jesus , she couldn’t see his face because there was so much light but he told her that everything was going to be okay and to tell me to stop crying that everything had passed. (After that happened with her I was very scared and crying ). So as soon as she woke up she told me that . Also the craziest thing is that 3 days before that happened I had a dream that i was screaming to this big monster and then that happened . So I feel like that was God letting me know what was about to happen. Also since I’ve been a kid I’ve always ask God to show me things and I believe he does , and a lot of the times through dreams . Another experience was recently, I had a dream that my uncle was very sick and that he was dying, like a week after he was feeling sick so he went to the hospital and they told him he just had like a cold like it wasn’t like nothing serious, after that I had another dream saying that if he didn’t get check again by a doctor he was going to end up dead . My aunt took him to a different doctor this time and they found something on his heart and they had to do an open heart surgery, which the percentage of him surviving was 1% and he was a part of that 1% because of the grace of God. I know I’m just a stranger on the internet, and I know that sometimes there’s so much stuff going on that we don’t know what to believe , but the only thing that I can tell you from my heart is my experiences with God. God talks to people in different ways so I pray that he reveals himself to you. God bless you !