deva-drohād guru-drohaḥ koṭi-koṭi-guṇādhikaḥ
deva-drohād guru-drohaḥ koṭi-koṭi-guṇādhikaḥ |
jñānāpavādo nāstikyaṁ tasmād koṭi-guṇādhikam ||
(Kūrma Purāṇa; cited in Hari-bhakti-vilāsa: 11.751; Bhakti Sandarbha: 265)
“Offence to guru is tens of millions of times worse than offence to the Deity. But denial of knowledge and disbelief are ten millions times worse than that [i.e., than offence to guru].”