In my class on teaching Reading and Writing that I take every Tuesday evening as part of my credentialling program, the following thought occurred to me, so I jotted it down:
In this job you're always neglecting something and someone, and you're always missing some trick that would make whatever you're doing smoother, richer, or more engaging.
It was good to recognize that when I feel this way it isn't an aberration, it really is in the nature of teaching.