Henry Nouwen:

One of the discoveries we make in [contemplative/centering] prayer is that the closer we come to God, the closer we come to all our brothers and sisters in the human family. God is not a private God. The God who dwells in our inner sanctuary is also the God who dwells in the inner sanctuary of each human being. (Henri Nouwen, Here and Now, 24, 25)

The Lord God Almighty:

Those controlled by the sinful nature cannot please God. You, however, are controlled not by the sinful nature but by the Spirit, if the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, he does not belong to Christ. But if Christ is in you, your body is dead because of sin, yet your spirit is alive because of righteousness. And if the Spirit of Him Who raised Jesus from the dead is living in you, He Who raised Christ from the dead will also give life to your mortal bodies through His Spirit, Who lives in you. (Romans 8:8-11)

See also:

WHO IS HENRI NOUWEN?

CONTEMPLATIVE SPIRITUALITY OF RICHARD FOSTER ROOTED IN THE EASTERN DESERT AND THOMAS MERTON

THE TERMINOLOGY TRAP OF “SPIRITUAL FORMATION”

EMERGING EASTERN-STYLE MEDITATION FOR GLOBAL PEACE…AND WORSE…