Bhagavatapurana 11.28.18

11.28.18

jñānaṃ viveko nigamas tapaś ca pratyakṣam aitihyam athānumānam /
ādy-antayor asya yad eva kevalaṃ kālaś ca hetuś ca tad eva madhye //

18. Discrimination is wisdom and the means thereof are the Veda and *Sastra*, *Tapas* (one's own duties), direct perception (realisation), tradition, precept and inference, what absolute thing exists in the beginning and at the end of this (Universe) is the

thing that exists in the middle also, and that alone is Kala, the giver of light and the cause.