What we have here is a wonderful reference to the Holy Triune God.

Saint Andrew of Caesarea writes on this verse, "Grace to you and peace from the Three Persons of the Holy Trinity, explaining that "the One Who Is" refers to the Father." "The One Who was" reminds us of some key verses of Saint in his Gospel where he says, "In the beginning was the Logos/Word" (John 1:1)-in the beginning of the creation that is. So, this "Who was" refers to the Son. And "the One Who is coming" refers to the Paraclete/tos or the Holy Spirit. Who came and stays in the Church and sanctifies the children of God through Holy Baptism.

Holy icons of the Feast of the Dormition (koimisis) of the Mother of God depict Christ in Glory, surrounded by a mandoria, looking at the body of His Mother stretched on a litter, which is a richly draped bier. The Virgin is clad in her red blued garments. We see Christ holding, in His arms, a small figure of a child clothed in white and crowned with a halo; it is the all-luminous soul of Mary, represented as a newborn infant, that He has just taken to Himself.

Emilianos (Emilian) the Confessor, Bishop of Kyzikos (Cyzicus), underwent much hardship and exile and affliction for the sake of the Orthodox veneration of the sacred icons. He endured the ferocious reign of that beastly minded lion, Emperor Leo V the Armenian, who reigned from 813 A.D. until 820 A.D. This emperor restored iconoclasm (the destruction of holy icons) after he was crowned in Hagia Sophia by Patriarch Nikephoros I (806 A.D. - 815). Predictably, Leo disposed of the Patriarch by deposing him and appointing in his place the iconoclast Theodores I Kassiteras (815-821 A.D.), John VII Grammatikos had prepared the iconoclasts for the council with mostly arguments from Hieria (754 A.D.). The 815 A.D. Council called the holy icons spurious and ordered their destruction.