Stillness is an undisturbed state of the intellect, the calm of a free and joyful soul, the tranquil unwavering stability of the heart in God, the contemplation of light, the knowledge of the mysteries of God, consciousness of wisdom by virtue of a pure mind, the abyss of divine intellections, the rapture of the intellect, intercourse with God, an unsleeping watchfulness, spiritual prayer, untroubled repose in the midst of great hardship and, finally, solidarity and union with God.
~Nikitas Stithatos
Prayerful Life 