Narada Bhakti Sutra 38-42 (chapter 3, section 2)

Satsang

Most Importantly it is the grace of great beings

or the grace of God.

To come in contact with a great being

is indeed extremely difficult,

It is impossible to know them fully

and yet it’s effect is invaluable.

Nevertheless it’s all due to grace.

Indeed grace and devotees

there is but any difference.

That alone is to be attained,

that alone is attained