There are two kinds of living entitles. Nitya-baddha means ever-conditioned. Ever-conditioned means those who are in this material world, they do not know when they came in touch with this material world. Neither do they know when they will be liberated. They are called nitya-baddha, ever-conditioned. And similarly, there are nitya-siddhas. Nitya-siddha means they never come in contact with this material world, and even they come here for some business, they do not forget their position. That is nitya-siddha. Try to understand. (Bg. Lecture, 1973)  The position of the nitya-siddhas is explained in the Padma Purana in connection with the narration of the Supreme Personality of Godhead and Satyabhama-devi. The Lord tells Satyabhama, "My dear Satyabhama-devi, I have descended to this earthly planet by the request of Lord Brahma and other demigods. Those who are born into this family of Yadu are all My eternal associates. My dear wife, you should not consider that My associates are ever separated from Me; they are My personal expansions, and as such, you must know that they are almost as powerful as I am. Because of their transcendental qualities, they are very, very dear to Me, as I am very, very dear to them." (Nectar of Devotion)