Unrelated tangents re: Constantine or any other EO saint aside (as I am not EO, I would not feel comfortable addressing this even if it were on topic, which it is not), veneration of the Theotokos has never included these devotions to her heart (in any understanding; it simply was not done), or likewise venerations to the sacred heart of Christ. The Catholic Encyclopedia confirms that these are post-schism activities, so appealing to Orthodox saints (who, yes, hail Mary! I am listening to the Coptic version of this as I type this, the “Shere ne Maria”) does nothing but contradict what your own Church says about the practices.
Let’s keep it simple here. First of all the EO veneration of their St.Constantine is not a Catholic veneration post schism, but it is not rejected or protested we just don’t view a man who murdered and lived a life of paganology deemed worthy to receive veneration, this line of reasoning is not off topic. The Catholic Church allows, not binding, on believers to have a devotion to the Immaculate heart of Mary and Jesus.
You falsely view this as one having a devotion to a heart of flesh. That is understandable coming from a Orthodox view, which remains stagnant in mixing the natural with the spiritual.
What I object to, is that you insist on your false view, because you read in the devotion “heart”. What the author’s intent deals with the gospel experiences lived which the heart experienced by both the blessed Virgin Mary and our dear Lord Jesus Christ, the spiritual life lived which comes from the heart, your view remains stagnant, because you relate this “heart” as to being venerated as a body part.
I assure you, the gospel message from the Immaculate heart of Mary and Jesus is pre-schism never post schism.
For one, the devotion relates to praying the gospels and meditating upon the gospel events (thus the author recommends reading the gospels) from the perspective viewed from the joy, sorrowful, Luminous, and Glorious events from Mary and Jesus heart of love and sacrifice.
If you pretend that these devotions are something new, then you are hard pressed to refute them.
This is the contradiction between your false view, and the Catholic view. Your view comes from the natural, while the Catholic view’s this devotion as both “flesh and Spiritual” which grounds the devotion to reflect upon the “Incarnation” =fully flesh and fully divine. From this take, places the devotee to meditate on the gospels events which is pre-schism. This is nothing new, what is new is venerating a Saint who’s life example could never compare to a real Catholic Saint and Martyr.
I think your argument that this devotion is post schism is never the case, because the foundation never changes.
** If God chose bread and wine to become his body and blood, are you venerating a part of this body, that you falsely think St. Anthanasius is referring too here? because after all we do venerate the blood and body of Christ. Do you do this veneration of Jesus body and blood which consist of body parts?
Are you not going against St. Anthanasius teaching here? If you can justify veneration of Jesus body and blood, I think you can graduate to venerating his Love and sacrifice from this heart, as Catholics do and have always done since the resurrection which is pre-schism.**
Peace be with you