Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 49

Sanskrit:

मृषा गिरस्ता ह्यसतीरसत्कथान कथ्यते यद् भगवानधोक्षज: ।तदेव सत्यं तदुहैव मङ्गलंतदेव पुण्यं भगवद्गुणोदयम् ॥ ४९ ॥

ITRANS:

mṛṣā giras tā hy asatīr asat-kathāna kathyate yad bhagavān adhokṣajaḥtad eva satyaṁ tad u haiva maṅgalaṁtad eva puṇyaṁ bhagavad-guṇodayam

Translation:

Words that do not describe the transcendental Personality of Godhead but instead deal with temporary matters are simply false and useless. Only those words that manifest the transcendental qualities of the Supreme Lord are actually truthful, auspicious and pious.

Purport:

Sooner or later, all material literature and discussion must fail the test of time. On the other hand, the transcendental descriptions of the Supreme Lord can free us from the bondage of illusion and restore us to our eternal status as loving servants of the Lord. Although men who are like animals may criticize the glorification of the Absolute Truth, those who are civilized should go on vigorously propagating the transcendental glories of the Lord.