Look in thy glass and tell the face thou viewest
Time doth transfix the flourish set on youth.
Those hours, that with gentle work did frame
The lovely gaze where every eye doth dwell,
Will play the tyrants to the very same
That thou among the wastes of time must go.
The point will come soon after when thou viewest,
When squareth it the debt all owe the hour,
And thine sharpened figure will be rounded.
This one only took 23 hours for someone on the xkcd forums to solve.