Śrīmad-Bhāgavatam · Text 12.3.26
Who is speaking and story frame
सत्त्वं रजस्तम इति दृश्यन्ते पुरुषे गुणा: ।
कालसञ्चोदितास्ते वै परिवर्तन्त आत्मनि ॥ २६ ॥
sattvaṁ rajas tama iti
dṛśyante puruṣe guṇāḥ
kāla-sañcoditās te vai
parivartanta ātmani
The material modes — goodness, passion and ignorance — whose permutations are observed within a person’s mind, are set into motion by the power of time.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.