Actually hallucinations don't apply here, because a hallucination is seeing something that is not there, but those with Paul saw the same bright light as they fell down to their knees and also heard sounds at the time Paul saw Jesus. And he had no reason to believe in Jesus for his faith and standing in Judaism was prominent. Something really happened.

Mithra did not have multiple eyewitnesses, nor was there a resurrection recorded until after the resurrection of Jesus. The Talmud records Jesus. As Christianity was starting out, none would have had any interest except those who walked with the historical Jesus or those who were in fear of the prophecy of the coming Messiah such as predicted in Daniel.

If we want to determine the cause of the first single-celled life, darwinism can't help us. Man is unable to replicate the creation of the first single celled life from the inanimate and probably never will. Because of this fact, we must look to a greater reason for this formation. Hence, since all things in nature have a cause and nothing in nature can happen all by itself, it is easy to conclude that the uncreated would have been the ultimate cause as the only possibility, logically speaking. Now, he entered into creation to save you from yourself and your sins through the atonement, but it is your free-choice to refuse the forgiveness of your creator with hell as your final destination.

God is looking for the called out ones to walk with for eternity in the new city and new earth. Out of His glory, some will choose life.