Moments of Inspiration!

A few weeks ago, on our way home from Three Rivers at 6:00 am on a Sunday morning, a Christmas melody and words came to my mind for our children's Christmas program this year. It was truly inspired, so using the map light, I wrote it down on the back of Suzy's wedding invitation. Later in my zeal to get organized, I threw out the invitation (on garbage day, no less)! Oops! It has taken 3 weeks to retrieve the song out of the recesses of my brain, but I did it! Yesterday afternoon I had two verses recalled and Heidi called and asked to come over with the kids. In the 25 minutes before they came, I had figured out the 3rd verse and written another complete song for the pre-schoolers. Why is it that my brain can be so lacking at most moments and then have brain bursts in others?