You can read the whole thing here. And even if you don't want to read the whole thing (or any of it...), there's a lovely, 3-minute video at the top of the page about the 100th Opening Day at Wrigley Field.
(In the video, you'll see four people throwing out the first pitch at this year's first game -- three Cubs and oddly one person in the uniform of the visiting Philadelphia Phillies. If you're wondering why the team had someone from the opponents throwing out the first ball, it's because the four men are the living Cubs in the Hall of Fame -- Ernie Banks, Billy WIlliams, Ferguson Jenkins and Ryne Sandberg, who's now the Phillie manager. I think it was terrific that the Cubs chose to include Ryno.)