Marx's Analogy of the Silkworm

Marx says the laborer who for 12 hours long, we've spins, bores, turns, builds, shovels, breaks stone, carries, hods, and so on, is not regarded by him as a manifestation of life. Life for him begins where the activity ceases and the table at the tavern in bed. So what do we think of his analogy of the silkworm? If the silkworms objective and spinning were to prolong its existence as caterpillar, it would be a perfect example of a wage worker.