Holy Fathers on the Name of God: St. Hesychius the Presbyter

Truly blessed is the man whose mind and heart are as closely attached to the Jesus Prayer and to the ceaseless invocation of His Name as air to the body or flame to the wax. The sun rising over the earth creates daylight; and the venerable and holy Name of the Lord Jesus, shining continually  in the mind, gives birth to countless intellections radiant as the sun.

St. Hesychius  the Presbyter, On Watchfulness and Holiness, 196.
(The Philokalia, Vol. I, trans. Palmer, et al)