Suffering a violent death, Mithras arose from his tomb an event celebrated annually at the Spring Equinox. After the earthly mission of this god had been accomplished, he took part in a Last Supper with his companions before ascending to heaven, to forever protect the faithful from above.
The similarities to Christianity go on in much more detail: baptism, that he atoned for all man’s sins … etc. Coincidence? Did the followers of Mithras co-opt their god fable from Jesus and the Christian tradition? Not likely, since the cult of Mithras preceded Christianity by over 600 years.
How do Christians deal with this? Well, one of two ways. They either deny such a god figure existed, out of ignorance or avoidance, or, like the famous 2nd century Christian apologist Justin Martyr (1 Apologia, 66, 4), they denounce the devil for having sent a God so similar to Jesus – yet preceding him.
As Christians celebrate their Easter, they are in fact celebrating the Resurrection Festival of Mithras. His will be done.
Some of many source materials: