Śrīmad-Bhāgavatam · Text 11.28.4
Who is speaking and story frame
किं भद्रं किमभद्रं वा द्वैतस्यावस्तुन: कियत् ।
वाचोदितं तदनृतं मनसा ध्यातमेव च ॥ ४ ॥
kiṁ bhadraṁ kim abhadraṁ vā
dvaitasyāvastunaḥ kiyat
vācoditaṁ tad anṛtaṁ
manasā dhyātam eva ca
That which is expressed by material words or meditated upon by the material mind is not ultimate truth. What, therefore, is actually good or bad within this insubstantial world of duality, and how can the extent of such good and bad be measured?
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.