Bhagavad-gita 5.4-6 Above, a devotee is engaged in various devotional activities for the Deities (authorized incarnations of the Lord, who comes in this form to accept our service). Below, a sankhya-yogi engages in the analytical study of matter and spirit. After some time he realizes the Lord (the forms of Radha and Krsna include all other forms of the Lord) within his heart, and then he engages in devotional service.