God keeps all things in His power, amongst them myself, with my soul and body, and every hard substance, and every liquid and transparent substance;
thus He also keeps the very air in which I stand and by which I breathe, keeps every particle of it, and therefore He is called the Upholder of all things, for He holds in the palm of His hand all creatures, down to the very smallest.
How then is it possible that He should not be anywhere, in any place? How is it possible that the "Truth of things," the Origin of their being, should not be anywhere?
If you say these words to yourself inwardly, your heart struck by doubt shall immediately revive and be at rest, which also serves as the strongest proof of the omnipresence of God, especially in our souls.
Glory to Thee, all-powerful King, for not having left me in the darkness of hell, but for continually sending me Thy light in my darkness!
"Thou also shalt light my candle; the Lord my God shall make my darkness to be light."
St John of Kronstadt