Srila Prabhupada - Vedic Teachings

  "The Supreme Lord is cognizant and all-powerful, and by His causeless mercy He empowers a living entity to receive His mercy. Being under the spell of conditional life, people in general are averse to rendering devotional service and practicing Kṛṣṇa consciousness. In fact, most people are unaware of the principal teachings of Kṛṣṇa consciousness regarding one's eternal relationship with the Supreme Personality of Godhead and the ultimate goal of life, which is to return home, back to Godhead. Nor are people aware of the process by which one can return to the spiritual world. Because these important subject matters are unknown to the conditioned soul, Lord Caitanya, out of His causeless mercy, instructed Rūpa Gosvāmī in the principles of devotional service. Later, for the good of the people in general, Rūpa Gosvāmī distributed this information of the science of devotional service.” (Teachings of Lord Caitanya,  TLC 1: Teachings to Rupa Gosvami )

  „One mustard seed is calculated to be a universe itself. In one of the universes, in which we are now living, the number of planets cannot be counted by human energy, and so how can we think of the sum total in all the universes, which are compared to a bucketful of mustard seeds? And the planets in the spiritual sky are at least three times the number of those in the material sky. Such planets, being spiritual, are in fact transcendental to the material modes; therefore they are constituted in the mode of unalloyed goodness only. The conception of spiritual bliss (brahmānanda) is fully present in those planets. Each of them is eternal, indestructible and free from all kinds of inebrieties experienced in the material world. Each of them is self-illuminating and more powerfully dazzling than (if we can imagine) the total sunshine of millions of mundane suns. The inhabitants of those planets are liberated from birth, death, old age and diseases and have full knowledge of everything...