Replied Find a Doorway That Fits Us Both by Tom Barrett (The Curious Creative)
As King suggests the first line is an invitation. As a teacher this might be the first interaction in a school day, or the opening activity of a period of learning. Crucial moments to draw learners in and engage their curiosity.
I think that this counts for blogs as well. With the statistics suggesting that people rarely read beyond the first few lines, it is important to make it count. For the last year I have been starting each post with an ‘excerpt’ that hopefully helps readers know if it is of interest.