Instead of believing, accept.

There is no proof of flat earth, or gravity. However, there is no proof to the contrary, either. There is no proof that aliens built the pyramids, or that ghosts exist. But there is no proof to the contrary.

What you see is what you choose to believe. Accept what you see, and do not deny other people their right to do the same. Because you will never truly know the truth, you can only accept your own point of view.