"ami-'sambandha'-tattva, amara jnana-vijnana
ama paite sadhana-bhakti 'abhidheya'-nama
ami—I; sambandha-tattva—the center of all relationships; amara—of Me; jnana—knowledge; vijnana—practical application of that knowledge; ama paite—to obtain Me; sadhana-bhakti—the practice of devotional service; abhidheya-nama—is called activities in that relationship.
"Lord Krsna says, 'I am the center of all relationships. Knowledge of Me and the practical application of that knowledge is actual knowledge. Approaching Me for devotional service is called abhidheya.
Spiritual knowledge means fully understanding the Absolute Truth in three features-impersonal Brahman, localized Paramatma and the all-powerful Supreme Personality of Godhead. Ultimately when one takes shelter at the lotus feet of the Supreme Personality of Godhead and engages in the Lord's service, the resultant knowledge is called vijnana, special knowledge, or the practical application of spiritual knowledge. One should be engaged in the Lord's devotional service to achieve the aim of life, called prayojana. The practice of devotional service to attain that goal of life is called abhidheya.
Link to this page: https://prabhupadabooks.com/cc/madhya/25/103