Let us work with our body and pray with our soul. Let our outward man perform his bodily labors and our inward man be consecrated to the service of God, and never slack up in that spiritual work of the prayer of the mind, as the God-man Jesus also commands us, saying in the Holy gospel: But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father, which is in secret [Matt 6.6]. The closet of our soul is our body; our doors are our five senses. The soul enters into its closet when the mind does not wander to and fro among worldly matters and things, but remains within our heart. Our senses are closed and remain so when we do not allow them to cling to outward sensible things, and in this way our mind remains free from every worldly attachment and through secret prayer of the mind is united with God our Father […]

This spiritual prayer ascends to the very throne of God and is preserved in gold phials and, like a censer, wafts its fragrance before the Lord, as St. John the Theologian saw in Revelation: Four and twenty elders fell down before the Lamb, having every one of them harps and golden vials full of odors, which are the prayers of saints [Rev. 5.8]

This spiritual prayer is a light enlightening the soul of man and inflaming his heart with the fire of love for God. It is a chain uniting God to man, and man to God. O, incomparable grace of spiritual prayer! It puts man into the position of a constant converser with God. O, truly wonderful and most wonderful work! Bodily you have intercourse with men and with your mind you converse with God […]

And what more do you wish when, as I said, you are always with your mind before the face of God and constantly converse with Him – converse with God, without whom no man can be blessed, whether here or in the other life […]

Cf. Treasures of Athos Holy Mount