If you want to hear more David Platt sermons or his entire series on what the Gospel demands go to www.radicalthebook.com/resources.html and below sermon resources for each chapter of his book he has sermons that go along with each chapter. I would highly recommend reading the book too! It has changed my thinking completely. It is time to make huge sacrifices for Christ. As he puts it "We are His plan A, there is no plan B."