Without that it's a matter of faith. And I don't have any.
The fact the Shroud's 3D image created by a "mini Big Bang" when He rose from death cannot be reproduced by 21st century technology is scientific proof.
I understand atheists will engage in pretzel logic to deny God...not unlike leftists deny God so they can operate without guilt.
Good luck in your journey...and hope you find God and His Truth.
As I stated before, even satan knows that God really does exist.