For the late poet Thomas Lux ,
who reportedly died on February 5
(See posts tagged Bewitchment) —
"A darker riddle with no answer looms . . . .
For those who linger on among the tombs"
— John Hollander, from a poem in A Draft of Light
Those who enjoy dark riddles with no answers
may search the Web for "Sefer Yetzirah" + Cube.
I prefer a purely mathematical approach to the cube.