You don’t realize how smart Mack is unless you happen to eavesdrop on a dialogue he might be having with an expert. I’ve been there when suddenly the language being spoken hardly resembles English, and I find myself struggling to grasp the concepts spilling out like a tumbling river of gemstones. He can speak intelligently about most anything, and even though you sense he has strong convictions, he has a gentle way about him that lets you keep yours.
