I remember when I was a little boy waking up in the middle of the night and calling out in the dark to my mom.
I could not see her but I knew she was there. If I went by sight I would never have called out to her and I would not have received the help I wanted.
The same with God, we cannot see Him but we know He is there. We must realize that we live by faith or we will never call out to Him and receive what we need.
In certain ways, I see all people as people of faith. That is not saying that all people have faith in God but all have faith. Some people have faith in science, some in various religions, some in humanity and others have faith in God.
God loves each one of us no matter what we put our faith in. He has come to call us to himself, to accept us and to love us.
None of us can prove beyond a doubt that there is a God or that there is not a God. None of us can prove Heaven or Hell. It is all by faith.
Just as it is by faith that we flip a light switch and expect the lights to come on, or sit on a chair and expect it to hold us, it is by faith we accept God and know He is there and has provided access to fellowship with him by grace.
Don’t worry about trying to prove God to everyone you meet. Live your life daily by faith in God. Allow Him to live through you to touch others and, in his way and time, prove himself.