Unexplainable
God is an inexplicable being and we do not have any prior knowledge of Him.

How will you ever make a person understand what an apple looks like, till he has seen it for himself? Even in the worldly sense, you are able to understand an object’s appearance based on experience only. God is an inexplicable being and we do not have any prior knowledge of Him. That is why we do not understand His Presence. We discern an unknown being only through a known object. And none of those who have known Him was in a position to express his or her experience.
You manufacture a device made of salt and engage a person to fathom the depths of an ocean using that contraption. How long will the salt device remain in one piece? It gets dissolved in the salty waters of the ocean. Nothing remains to explain to you the process.
Similarly, those who set out to fathom the Paramathma Sagara, the Ocean of Bliss called God, were absorbed into the Divine. They were unable to express that experience, because, from then onward, they were not themselves, they were HIM.
Nothing is good, nothing is bad. Nothing is sin, nobody is sinner.