Michael Horton's writings were very influential to the development of my theology of spirituality. I highly recommend In the Face of God, written when Blackaby's Experiencing God and Sonic Flood were all the rage. He is one of the top Reformed thinkers out there.
I came across something he wrote in 2007--an evaluation of Joel Osteen's message. It's not shocking that a Reformed theologian would disapprove of Osteen's message, but I think Horton's thoughts are especially good. He quotes Christian Smith in calling Osteen's message "moralistic, therapeutic deism." Ouch.
Salvation by Hospitality Alone? - Matthew Bates’s awesome book Salvation by Allegiance Alone pressed into the solas of Reformation theology by suggesting that “faith” connotes “allegiance” ...
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