But yet another thing is necessary, Purity of spirit; for an intelligence in repose without images, an intuition in the light of God, and a spirit el… - John of Ruysbroeck

Christ prayed that He should be in us, and we in Him. This we find in many passages in the Gospel. And this is the union that is without intermediary, for the love of God is not only out-flowing, but it is also drawing into unity. And those who feel and experience this become interior, enlightened men. There the faculties are raised above all practices to the bareness of their very essence. There the faculties become simplified above reason in their essence and because of this they are filled and overflowing. For in this simplicity the spirit finds itself united with God without intermediary. And this union, together with the exercise, which is proper to it, will endure eternally, as I have already said.

Here the reason no less than all separate acts Must give way, For our powers become simple in Love; They are silent And bowed down in the Presence of the Father. And this revelation of the Father Lifts the soul above the reason Into the Imageless Nudity. There the soul is simple, pure, spotless, Empty of all things; And it is in this state of perfect emptiness That the Father manifests His Divine radiance. To this radiance neither reason nor sense, Observation nor distinction, Can attain. All this must stay below; For the measureless radiance Blinds the eyes of the reason, They cannot bear the Incomprehensible Light. But above the reason, In the most secret part of the understanding, The simple eye is ever open. It contemplates and gazes at the Light With a pure sight that is lit by the Light itself: Eye to eye, Mirror to mirror, Image to image. This threefold act makes us like God, And unites us to Him; For the sight of the simple eye is a living mirror, Which God has made for His image, And whereon He has impressed it.

Such is the citadel of loving Souls where all pure intellects are united, in one simple Purity. This is the habitation of God in us, where none can operate but God alone; its Purity is eternal, there is neither time nor space, past nor future, always present and ready to be revealed to those pure intelligences raised to it.