No More Learning

These gross, half-animated lumps I leave;
Nor can I think what thoughts they can conceive;
But, if they think at all, 'tis sure no higher
Than matter, put in motion, may aspire;
Souls that can scarce ferment their mass of clay,
So drossy, so divisible are they,
As would but serve pure bodies for allay:
Such souls as shards produce, such beetle things
As only buzz to heaven with evening wings;
Strike in the dark,           but by chance;
Such are the blindfold blows of ignorance.