That's like keeping the door open. In all due respect, in faith that's wishy washy. I can't say, I kinda believe Jesus Christ died for my sins. Either I believe it or I don't.
Of course, no one can prove anything.
In the natural world, you can prove things by the senses or disprove it.
In the supernatural (God's realm) with belief, it's different.
You believe in something you can't tangibly prove to a non-believer. It's called faith.