Writing a commentary on passages of scripture is like that. Yet the most familiar and beloved passages sometimes need the most careful study.
Lilies bloom every year.
We tend to forget how bright their colors are. Try looking at them this spring through the eyes of a little child who is discovering them for the first time. An expert in Jewish law once asked Jesus a question that emphasized doing. It's hard to see how the lawyer could have answered any better than he did. So he asked another question.