I have never been much of a teacher, but I can see how teaching can act as a feather duster of the mind.

— Theodore Dalrymple, False Positive: A Year of Error, Omission, and Political Correctness in the New England Journal of Medicine

I would like to think of my mind as a tidy bookshelf which just needs an occasional dusting. But when I consider how much of my learning mainly involves unlearning things I mistakenly thought were true or forgetting things which are no longer useful, I think what I really need is a gardener to trim the shrubbery, pull the weeds, and most of all, take a leaf blower to all the debris cluttering up my synapses.