What Was It You Had Sown Which Should Have Borne A Rich Harvest?

What was it you had sown which should have borne a rich harvest?
You had but tanned a carcass hide,
shaped and stretched it taut on pegs,
(Your only care your own body which you pegged to the bonds of desire) .
But counsel to a fool is labour lost,
Like a ball thrown at a big-sized pillar,
rebounding but not hitting the mark;
Or fruitless as feeding a tawny bullock on sweet molasses,
And expect a yield of milk from him.