dehy ajño 'jita-ṣaḍ-vargo
necchan karmāṇi kāryate
kośakāra ivātmānaṁ
karmaṇācchādya muhyati
dehī - the embodied soul; ajñaḥ - without perfect knowledge; ajita-ṣaṭ-vargaḥ - who has not controlled the senses of perception and the mind; na icchan - without desiring; karmāṇi - activities for material benefit; kāryate - is caused to perform; kośakāraḥ - the silkworm; iva - like; ātmānam - himself; karmaṇā - by fruitive activities; ācchādya - covering; muhyati - becomes bewildered.
As already explained, the influence of the modes of nature is very strong. The living entity entangled in different types of fruitive activity is like a silkworm trapped in a cocoon. Getting free is very difficult unless he is helped by the Supreme Personality of Godhead.