A Reproof
a grook in answer to a long explanitory letter

by Piet Hein (1905-1996), inventor of the Soma Cube, Grooks, and other cool stuff.

In view of your manner
    of spending your days,
        I hope you may learn
            before ending them,
that the effort you spend
    on defending your ways
        could be better spent on
            amending them.