Tip of the hat to Tim Challies for the link.

All good books on preaching start with a section on the character of the preacher. I tip my hat at this noble practice by reminding you that if you brandish your iPad to complement the trendy hipster image you are carefully cultivating like a hidden hydroponic hemp garden, know this: God knows your heart, and your people will soon smell the stale odor of your pretentiousness.