In this song by Srila Bhaktivinod Thakur, the glories of Sri Guru are described. He also reminds us to imbibe an attitude of gratitude and always remain grateful.

Out of many millions of wandering living entities, one who is very fortunate gets an opportunity to associate with a bonafide spiritual master by the grace of Kṛṣṇa. By the mercy of both Kṛṣṇa and the spiritual master, such a person receives the seed of the creeper of devotional service.

(CC Madhya 19.151) https://vedabase.io/en/library/cc/madhya/19/151/)