Krishna is referred to as Svayam Bhagavan and Radha is illustrated as the primeval potency of the three main potencies of God, Hladini (immense spiritual bliss), Sandhini (eternality), and Samvit (existential consciousness), of which Radha is an embodiment of the feeling of love towards Krishna (Hladini).
With Krishna, Radha is acknowledged as the Supreme Goddess. Krishna is said to be satiated only by devotional service in loving servitude, personified by Radha. Radha is considered as the complete incarnation of Mahalakshmi.
It is believed that Krishna enchants the world, but Radha enchants even him. Therefore, she is the supreme goddess of all, and together they are called Radha-Krishna.