Retra Remarks

If you live under a rock,
you might think that the sun
is a crack in the Earth.

... a poetic image posted in reply to a Category Theory question [1] by user "Retra", some of whose comments seem similarly intriguing, e.g., excerpted:

... and in response to a critique of such comments, Retra's meta-comment:

(typos fixed and comments extracted from context for impact) - ^z - 2019-04-27