Vadanti tat tattva-vidas tattvaṁ yaj jñānam advayam
Brahmeti paramātmeti bhagavān iti kathyate
That knowledge which is without any form of differences (non-dual principle) is called ‘Tattva’ (reality, principle). This is what eminent learned souls who are masters in this tattva declare. Such tattva is being referred to as Brahma, Paramatma or Bhagavan.
from Srimad Bhagavatam – Day 8(Translations of Pujya Sri Ganapathy Sachchidananda Swamiji’s daily explanation of Srimad Bhagavatam on ETV from December 2015 onwards are compiled by Parimala Eshwarla)