My quote is from his book "Celebration of Disipline" which is one of those rare books that not only changed the way I view the world (and my role in it) but physically changed the way I live my life. I have read nothing else by him, or of the others you mentioned.
Of the total man, I know little (except, yes that he was a Quaker, which was fine since I used to be Brethren in Christ/Mennonite) but of this one work, I and many others consider it a modern Christian must-read.
Have you ever read "Celebration of Discipline"?
Actually, the ministries of Kenneth Hagin and Kenneth Copeland might not be a bad place to investigate, in spite of this other individual's feelings. They teach to take the Bible as God's Word, and apply It to one's everyday life for everyday things.
For instance, I have cancer; have had it for a long time. Should have died eight years ago and was bed-ridden for years. But I took God at His Word, as taught by Gloria Copeland, Kenneth's wife, saying over, and over, over and over, and over, etc. Isaiah 53: 5 and 1 Peter 2:24 "By whose stripes I am healed." God got me out of my death bed--it took a while, believe me! I still have this problem, but God is going to finish what He began, so I continue with my faith. Anyway, this is more of what Rhema is, rather than visualization, I guess that other poster was suggesting Rhema was?
Anyway, Rhema.org or kcm.org is where you could look.
It was recommended to me by a friend. I bought it. I have also done some research on Foster.
My greatest concern is in Chapter one on Meditation.
I draw your attention to page 30 third paragraph from the bottom, which includes
" Till your whole New Testament is all over autobiographic of you"
Tehillim (Psalm) 19:14 May the words of my mouth and the meditation of my heart
be pleasing in your sight, O LORD, my Rock and my Redeemer
chuck <truth@YeshuaHaMashiach>