Earlier quoted context omitted.
I can never imagine having as much knowledge of any programming language as Casey does. After only programming for a year now, it blows my mind that anyone can know and explain programming as well he does.
That is a pretty naive point of view. That amount of know-how, and I'm assuming he knows much more that has presented, is normal for someone who has been programming for 15+ years straight. If you find yourself still seriously programming after a few years, try evaluating this position then.
Still I think in my position I am qualified to say that Casey is exceptionally good at explaining programming.