Thomas Keating and William Meninger, Cistercian monks at the Benedictine Monastery in Snowmass, Colorado. They were two of the architects of what is called "Centering Prayer". http://en.wikipedia.org/wiki/Centering_prayer
Thomas Merton was a Christian mystical giant in the 20th Century.
"The act of total surrender is not merely a fantastic intellectual and mystical gamble; it is something much more serious. It is an act of love for this unseen person, who, in the very gift of love by which we surrender ourselves to his reality also makes his presence known to us." -- Merton (In Centering Prayer.., Bourgeault, 2004)
who isn't inspired by Rumi and Hafez.
"When all your desires are distilled,
You will cast just two votes:
To love more
And be happy."
-- Hafez (The Gift, Ladinsky, 1999)
"The awakened lover speaks directly to the beloved:
You are the sky my spirit circles in, the love inside love, the resurrection place."
--Rūmī (The Essential Rumi, Barks, 1995)
"...Of the Friend and your loving...
Any dividing there
Makes other untrue distinctions like "Jew," "Christian" and "Muslim". "
And the message of God's love can be found in many places:
"In the Name of God, the Kind and Merciful"
باسم الله الرحمن والرحيم.
which is the 1st verse of the Qur'an and repeated at the start of each chapter as the loving refrain of the faith
The Merkabah (Chariot) Mysticism, based on Ezekial’s image of Yahwe riding upon the chariot.“ He felt instinctively that the Merkabah typified the human longing for the sight of the Divine Presence and companionship with it. To attain this end was, to him, the acme of all spiritual life. It was the aim of the mystic to be a ...'Merkabah-rider,' so that he might be enabled, while still in the trammels of the flesh, to mount up to his spiritual Eldorado. It was interpreted as a sort of Divine self-opening, self-condescension to man. The door is flung wide open so that man, at the direct invitation of God, can come to the secret for which he longs and seeks. This idea is a supreme factor in the mystic life of all religions. The soul is urged on to seek union with God, only because it feels that God has first gone out, on His own initiative and uninvited, to seek union with it. The human movement from within is but a response to a larger Divine movement from without. The call has come; the answer must come. The governing idea is based on a conception general to all the mystics, viz. that the Reality is a kind of pilgrimage, and the seeker is a traveler towards his home in God. Pride, to the Rabbis, was the most terrible pitfall in the path of the religious life. Its opposite, humility, was the starting-point of all the virtues.” From Chapter 2: from "Jewish Mysticism" by J. Abelson