"God brings books at their appointed times. The Hidden Life of Prayer arrived late but well-timed. This little jewel-strewn tapestry has done for me at 64 what Bounds' Power Through Prayer did at 34. I could be ashamed that I need inspiration for the highest privilege. But I choose to be thankful."
- John Piper, Senior Pastor, Bethlehem Baptist Church, Minneapolis, Minnesota

""I have read The Hidden Life of Prayer again and again since Westminster Seminary in Philadelphia first gave it to me when I visited there as a prospective student forty years ago. Every time I read this book, the Lord uses it to deepen my prayer life and encourage my faith. I strongly recommend it!"
- Wayne Grudem, Research Professor of Theology and Biblical Studies, Phoenix Seminary, Phoenix, Arizona, USA

"It was in 1971 I first read this book I was shown a copy in Al Martin's home and he told me how he used it, which plan I took up enthusiastically and have used ever since. I have read it through aloud during a week of morning meetings with various assistants and with deacons before they have started work... Every time I read it I discover something fresh, convicting and helpful. The book does not make you afraid of prayer. It has a fragrance of Disruption times and the Awakening in the middle of the 19th century, in fact the author was born in that great year of 1859. He later married the daughter of Andrew Bonar and that warm piety and close walk with God characterizes this, McIntyre's best book.
- Geoff Thomas, Alfred Place Baptist Church (Independent), Aberystwyth, Wales