This is quite frankly a perfect depiction of how great suffering can coincide in the soul along with great joy. Joy does not in one small part diminish her suffering, but the suffering does not take away from her joy. It is as if you can hear Mary saying "You have done it! Amen my Son, you have accomplished the redemption of Man! O how terrible! O how wonderful!"
"I will remain with You and see you through to the House of the Father. I too offer myself to the Eternal Father for the salvation of souls! I offer myself and would die for You if I could my Son. How is it that you die and I still live?" How touching the way St. John supports and cares for our Blessed Mother but does not wisk her away. Like a real man he stands by her side, with great respect and awe he assists her in carrying this great burden. He witnesses the sacrifice of the Lord in body, and also the sacrifice of Mary in spirit. What a great honor was given to St. John.
I don't even know what to say about poor Mary Magdalen giving in to her grief at our Lord's feet. We would all do well to bring all our cares, our burdens and our sorrows such as this in prayer at all times.
I place my poor soul at your feet as did Mary Magdalen Lord, in time and for all eternity. Amen