If you give Him service wholeheartedly, sincerely, then by the mercy of Krsna, you'll make advancement. Sevonmukhe hi jihvadau svayam eva sphuraty adah (Brs. 1.2.234). God will reveal

Expressions researched:
"if you give Him service wholeheartedly, sincerely, then by the mercy of Kṛṣṇa, you'll make advancement. Sevonmukhe hi jihvādau svayam eva sphuraty adaḥ (Brs. 1.2.234). God will reveal"

Lectures

Srimad-Bhagavatam Lectures

You cannot increase your attachment for Kṛṣṇa without Kṛṣṇa's mercy. You cannot become devotee . . . therefore we have to simply serve Kṛṣṇa, sevonmukhe. By service Kṛṣṇa is very satisfied. Kṛṣṇa does not require anyone's service; He's perfect Himself. But if you give Him service wholeheartedly, sincerely, then by the mercy of Kṛṣṇa, you'll make advancement. Sevonmukhe hi jihvādau svayam eva sphuraty adaḥ (Brs. 1.2.234). God will reveal. You cannot see God by your these blunt eyes. That is not possible.

730504 - Lecture SB 01.08.42 - Los Angeles

So if we increase our attachment for Kṛṣṇa, then the detachment or renouncement of this material world will automatically come. Bhaktiḥ pareśānubhavo viraktir anyatra syāt (SB 11.2.42). If we increase our attachment, then that, Kuntīdevī is praying.That is also Kṛṣṇa's mercy. You cannot increase your attachment for Kṛṣṇa without Kṛṣṇa's mercy. You cannot become devotee . . . therefore we have to simply serve Kṛṣṇa, sevonmukhe. By service Kṛṣṇa is very satisfied. Kṛṣṇa does not require anyone's service; He's perfect Himself. But if you give Him service wholeheartedly, sincerely, then by the mercy of Kṛṣṇa, you'll make advancement. Sevonmukhe hi jihvādau svayam eva sphuraty adaḥ (Brs. 1.2.234). God will reveal. You cannot see God by your these blunt eyes. That is not possible. Premāñjana-cchurita-bhakti-vilocanena santaḥ sadaiva (Bs. 5.38). You have to smear your eyes with the ointment of love. Then Kṛṣṇa will reveal. Kṛṣṇa will come in front of you.