When you take in something that you were not meant to consume you become sick. This same principle that applies physically also applies spiritually. Greg discussed the proper spiritual diet of the Christian.
"Just a note of thanks. I came across the site, having heard Greg speak in Ireland many moons ago. The church here is a bit jaded, we have found. Groupthink, lack of going deep, fear, perhaps, of facing tough questions. [WH has] great sermons, and not just from Greg. Real food for a somewhat undernourished Irish Christian. Keep it up! Ian from Ireland"
– Ian, from Ireland