Kṛṣṇa's transcendental body is eternal, full of knowledge and bliss. Sat means ever-existing for all time and in all places; in other words, all-pervading in time and space. Cit means full of knowledge. Kṛṣṇa has nothing to learn from anyone. He is independently full of all knowledge. Ānanda means the reservoir of all pleasure. The impersonalists are seeking to merge into the Brahman effulgence of eternity and knowledge, but the major portion of the absolute pleasure which is in Kṛṣṇa is avoided by them. One can enjoy the transcendental blissfulness of merging into the Brahman effulgence after being freed from the contamination of material illusion, false identification, attachment, detachment and material absorption. These are the preliminary qualifications of a person who can realize Brahman. It is stated in Bhagavad-gītā that one has to become full of joyfulness; this is not exactly joyfulness, but a sense of freedom from all anxieties. Freedom from all anxieties may be the first principle of joyfulness, but it is not actual joyfulness. Those who realize the self, or become brahma-bhūta (S.B.4:30:20), are only preparing themselves for the platform of joyfulness. That joyfulness can be actually achieved only when one comes into contact with Kṛṣṇa. Kṛṣṇa consciousness is so complete that it includes the transcendental pleasure derived from impersonal or Brahman realization. Even the impersonalist will become attracted to the personal form of Kṛṣṇa, known as Śyāmasundara.
(Nectar of Devotion).

Those who are Kṛṣṇa conscious are very intelligent because they are not interested in getting promotion to any planet where there is death, despite a long duration of life there. Rather, they want to get a body like God's. Īśvaraḥ paramaḥ kṛṣṇaḥ sac-cid-ānanda-vigrahaḥ. (Bs. 5.1) God's body is sac-cid-ānanda. Sat means "eternal," and cit means "full of knowledge." Ānanda means "full of pleasure."
As stated in our pamphlet Kṛṣṇa, the Reservoir of Pleasure, if we transfer ourselves to the spiritual world, to Kṛṣṇa's planet or to any other spiritual planet, then we will get a body similar to God's: sac-cid-ānanda—eternal, full of knowledge and full of bliss. So those who try to be Kṛṣṇa conscious have a different aim of life than those who are trying to promote themselves to the better planets in this material world. Lord Kṛṣṇa says, mūrdhny ādhāyātmanaḥ prāṇam āsthito yoga-dhāraṇām: "The perfection of yoga is to transfer oneself to the spiritual world." (B.G.8:12)
(Easy Journey to other Planets).