Nothing to figure out, FF, if you LISTEN to Christ's words!
Such as to Mary-
John 20: 17-Jesus said, "Do not hold on to me, for I have not yet returned to the Father. Go instead to my brothers and tell them, 'I am returning to my Father and your Father, to my God and your God.' "
Jesus, too, served the One he called (John 17:3) "the Only True God".
Faith begins with learning about and getting to KNOW God- which cannot
be done with the so-called "Sacred Mystery"!
The real mystery is how ANYONE can believe it, after studying the Bible!
Yes it is a mystery. And one cannot believe it other than by the power of the Holy Spirit. The same Holy Spirit who is also an alien and unbelievable entity to those who have not experienced it, yet is so threatening to so many who have not--another mystery. (I do believe all can have the experience who are open to it.) Sometimes I think spiritual powers should be evident to all purely by the amount of resistance, hostility, anger, contempt, and denial generated by mention of religious faith, especially Christianity. Such passionately negative reactions are not nearly so evident re ghosts or alien abductions or BigFoot sightings.
Regarding the passage you cited, one must understand the New Testament for what it is however. The Synoptic Gospels (Matthew, Mark, and Luke) were not written as chronological or complete history nor were they written by a single author. They consist of a collection of sayings, oral tradition, eye witness accounts, and recollections that were widely known throughout the mid to late First Century Christian communities with the final editing reflecting a theological perspective of the editor or editors.
Mark is believed to be the earliest of the Gospels with the content almost wholly also contained in Matthew and Luke. Because eye witness accounts will remember different details differently, or place different emphasis on what is recalled, occasionally Matthew and Mark will disagree with Luke, Luke and Mark will disagree with Matthew, but in no place can you find Matthew and Luke agreeing with each other against Mark. You will find material in Matthew unqiue to Matthew and material in Luke unique to Luke. This is no different than reading three different histories of the same period of modern history and noting that the authors will occasionally disagree with each other on some detail or significances in events but there are some core facts and names that will be found in all, especially if one is used for research materials by the others.
Also what is contained in the New Testament was written by a people who did not expect it to take the Christ more than 2000 years to return. They weren't writing for us. They were writing for each other and left out a lot of detail that was common knowledge and was assumed to be familiar to all. That is why so much of scripure contains nuances and deeper meanings that may not be immediately obvious to the 21st Century reader. You have to read it through their eyes, not ours, to understand it.