Bhagavad Gita 4.24

4.24 Brahman is the oblation; Brahman is the melted butter (ghee); by Brahman is the oblation poured into the fire of Brahman; Brahman verily shall be reached by him who always sees Brahman in action.

A person who is fully absorbed in Kṛṣṇa consciousness is sure to attain the spiritual kingdom because of his full contribution to spiritual activities, in which the consummation is absolute and that which is offered is of the same spiritual nature.