This will certainly be a digression but... How far is Contemplative Spirituality (CS)/Centering Prayer (CP) from Lectio Divina? How far is Lectio Divina from TM? My answer - about as far as KC KS is from KC MO maybe less.
Contemplative Prayer does not have you contemplate anything, actually the opposite it encourages an emptying of the mind. (Does that bother anybody else besides me?!)
Brian Flynn who was heavily into TM became a Christian and was then appalled as he saw his church embrace CS/CP. To him this was virtually the same as the occult practices that absorbed his pre-Christian life. He wrote a book about his experiences called Running Against the Wind. He has a ministry called One Truth Ministries
I see no examples of nor warrants for these practices in scripture they really have an Eastern and Ancient Monastic heritage (Desert Fathers, St. John of the Cross, Teresa of Avila...) Here is a CS/CP proponents (not too brief) brief description and history.
Basically IMO the words Christian and Mystic do not belong in the same sentence. And while the term Spiritual Formation can and has been used in a legitimate sense (Contrast what is studied in Olivet's undergrad course in Spiritual Formation with NNU's online graduate SF course) more often than not the terms Spiritual Formation and Spiritual Disciplines are used almost synonymously with CS/CP. (If you can prove to me that TM and CP are not virtually the same I'd be interested but we should probably start a new post.)
IMO a representative of the real difference between TM & CP is, one uses the word : "Nam myoho renge kyo" for a mantra while the other uses the word "Jesus".
Professor Doug Hardy is a member of Spiritual Directors International which is an organization for Spiritual Directors of many false religions oops... I mean many Faith Traditions; really how closely should Christians align themselves with things of these traditions?
Does Christianity really belong grouped together with Kabbalah and Sufism?
These views do not stem from my Reformed leanings at all. My views on this significantly predate any Calvinist affinity I have developed.
This email was formulated without the use of Kunalini power or Chakras
People on my list of those who have lost their way are:
Brian Manning
Thomas Merton
Henri Nouwen
Richard Foster
Dallas Williard
Tony Jones
& Others...
and of course McLaren