The living entities are of two kinds: one class is called nitya-mukta, ever liberated, and the other is called nitya-baddha, ever conditioned. The nitya-mukta living entities are in the spiritual kingdom, and the nitya-baddhas are in the material world. In the spiritual world both the living entities and the Lord are manifest in their original status, like live sparks in a blazing fire. But in the material world, although the Lord is all-pervasive in His impersonal feature, the living entities have forgotten their Kṛṣṇa consciousness to a greater or lesser degree, just as sparks sometimes fall from a blazing fire and lose their original brilliant condition. The sparks fall into different conditions and retain more or less of their original brilliance. Some sparks fall onto dry grass and thus ignite another big fire. This is a reference to the pure devotees who take compassion on the poor and innocent living entities. The pure devotee ignites Kṛṣṇa consciousness in the hearts of the conditioned souls, and thus the blazing fire of the spiritual world becomes manifest even within this material world. Some sparks fall onto water; they immediately lose their original brilliance and become extinct. They are comparable to the living entities who take their birth in the midst of gross materialists, in which case their original Kṛṣṇa consciousness becomes extinct. Some sparks fall to the ground and remain midway between the blazing and extinct conditions. Thus some living entities are without Kṛṣṇa consciousness, some are between having and not having Kṛṣṇa consciousness, and some are actually situated in Kṛṣṇa consciousness. The demigods in the higher planets—Lord Brahmā, Indra, Candra, the sun-god and various other demigods—are all Kṛṣṇa conscious. Human society is between the demigods and the animals, and thus some humans are more or less Kṛṣṇa conscious and some are completely forgetful of Kṛṣṇa consciousness. The third-grade living entities, namely the animals, beasts, plants, trees and aquatics, have completely forgotten Kṛṣṇa consciousness. This example stated in the Vedas regarding the sparks of a blazing fire is very appropriate for understanding the condition of different types of living entities. But above all other living entities is the Supreme Personality of Godhead, Kṛṣṇa, or Puruṣottama, who is always liberated from all material conditions.
The question may be raised as to why the living entities have fallen by chance into different conditions of life. To answer this question, we first have to understand that there cannot be any influence of chance for the living entities; chance is for nonliving entities. According to the Vedic literature, living entities have knowledge, and thus they are called cetana, which means "in knowledge." Their situation in different conditions of life, therefore, is not accidental. It is by their choice, because they have knowledge. In the Bhagavad-gītā the Lord says, "Give up everything and just surrender unto Me." This process of realizing the Supreme Personality of Godhead is open for everyone, but still it is the choice of the particular living entity whether to accept or reject this proposal. In the last portion of the Bhagavad-gītā, Lord Kṛṣṇa very plainly says to Arjuna, "My dear Arjuna, now I have spoken everything to you. Now you may choose to accept it or not." Similarly, the living entities who have come down to this material world have made their own choice to enjoy this material world. It is not that Kṛṣṇa sent them into this world. The material world was created for the enjoyment of living entities who wanted to give up the eternal service of the Lord to become the supreme enjoyer themselves. According to Vaiṣṇava philosophy, when a living entity desires to gratify his senses and forgets the service of the Lord, he is given a place in the material world to act freely according to his desire, and therefore he creates a condition of life in which he either enjoys or suffers. We should definitely know that both the Lord and the living entities are eternally cognizant. There is no birth and death for either the Lord or the living entities. When creation takes place, this does not mean that the living entities are created. The Lord creates the material world to give the conditioned souls a chance to elevate themselves to the higher platform of Kṛṣṇa consciousness. If a conditioned soul does not take advantage of this opportunity, after the dissolution of this material world he enters into the body of Nārāyaṇa and remains there in deep sleep until the time of another creation.