Archimandrite Zacharias (Zacharou) , Ph. D., is a disciple of Elder Sophrony, who was a disciple of St. Silouan of Mount Athos. Presently, Fr. Zacharias is a monk in the Monastery founded by Elder Sophrony: The Monastery of St. John the Baptist, Tolleshunt Knights by Maldon, Essex, England.

“The heart is within our chest. When we speak of the heart, we speak of our spiritual heart which coincides with the fleshly one; but when man receives illumination and sanctification, then his whole being becomes a heart. The heart is synonymous with the soul, with the spirit; it is a spiritual place where man finds his unity, where his nous is enthroned when it has been healed of the passions. Not only his nous, but his whole body too is concentrated there. St. Gregory Palamas says that the heart is the very body of our body, a place where man’s whole being becomes like a knot. When mind [rational faculty] and heart [noetic faculty] unite, man possesses his [whole] nature and there is no dispersion and division in him any more. That is the sanctified state of the man who is healed.
On the contrary, in our natural and fallen state, we are divided: we think one thing with our mind, we feel another with our senses, we desire yet another with our heart. However, when mind and heart are united by the grace of God, then man has only one thought — the thought of God; he has only one desire — the desire for God; and only one sensation — the noetic sensation of God.”    ~ Very Rev. Archimandrite Zacharias (Zacharou)