Lately at the gym I’ve been listening to Dallas Willard’s Renovation of the Heart (running time: 12 hours!) on my iPod. Once a week I download Tim Keller’s sermons and plug that in while I work out. Tim is the type of preacher I want to be when I grow up. If you haven’t listened to him, it’s worth checking out. It’s not free but the small charge is worth it in my books.