Srimad Bhagavatam 1.1.7_8

Lord Badarayana, foremost knower of the Vedas, and other sages who know of the formful and formless Lord, whatever knowledge they have, you know it very well. Your heart is very simple and pure, which is why the Lord has bestowed His grace and favor upon you. Teachers convey the most secret teachings to their favorite disciples || 7-8 ||