You know a sunny winter day can fool you, you look out the window and you say, "Oh it looks warm," then you go out there and you shiver your timbers and catch a cold for next week! But that sun can get something really warm. Yeah, even on a cold winter day. You know, if you put a board out there, a two-by-four, and you know the old science experiment, you hold a glass over that board and then you let that same sun shine on that through the glass. Eventually that board's going to get very warm, and it may start to smoke...I mean you could probably burn your initials in there if you did it long enough. Now, it's the same board, same sun, what's the difference? That piece of glass makes the difference. Why? Something transforming happens when you focus all that heat, on one spot.