the sermon of a man who stayed up all night praying

Preparing to speak on Jesus' 'sermon on the plain' in Luke 6. It's hardly a model to follow by today's standards of what makes for an effective sermon - no neat illustrations, no clever introduction and no technology to help the wandering mind. But it had this (and this is what challenges me most): "It is a sermon of a man who has stayed up all night praying." (Michael Card)