[continued]
"You question about eternal life and the entrance into the Kingdom. The outer expression used for the Kingdom is heaven; but this is a comparison and similitude, not a reality or fact, for the Kingdom is not a material place; it is sanctified from time and place. It is a spiritual world, a divine world, and the center of the Sovereignty of God; it is freed from body and that which is corporeal, and it is purified and sanctified from the imaginations of the human world. To be limited to place is a property of bodies and not of spirits. Place and time surround the body, not the mind and spirit. Observe that the body of man is confined to a small place; it covers only two spans of earth. But the spirit and mind of man travel to all countries and regions−even through the limitless space of the heavens−surround all that exists, and make discoveries in the exalted spheres and infinite distances. This is because the spirit has no place; it is placeless; and for the spirit the earth and the heaven are as one since it makes discoveries in both. But the body is limited to a place and does not know that which is beyond it.
"For life is of two kinds: that of the body and that of the spirit. The life of the body is material life, but the life of the spirit expresses the existence of the Kingdom, which consists in receiving the Spirit of God and becoming vivified by the breath of the Holy Spirit. Although the material life has existence, it is pure nonexistence and absolute death for the holy saints. So man exists, and this stone also exists, but what a difference between the existence of man and that of the stone! Though the stone exists, in relation to the existence of man it is nonexistent.
"The meaning of eternal life is the gift of the Holy Spirit, as the flower receives the gift of the season, the air, and the breezes of spring. Consider: this flower had life in the beginning like the life of the mineral; but by the coming of the season of spring, of the bounty of the clouds of the springtime, and of the heat of the glowing sun, it attained to another life of the utmost freshness, delicacy and fragrance. The first life of the flower, in comparison to the second life, is death.
"... [T]he life of the Kingdom is the life of the spirit, the eternal life, and that it is purified from place, like the spirit of man which has no place. For if you examine the human body, you will not find a special spot or locality for the spirit, for it has never had a place; it is immaterial. It has a connection with the body like that of the sun with this mirror. The sun is not within the mirror, but it has a connection with the mirror.
"In the same way the world of the Kingdom is sanctified from everything that can be perceived by the eye or by the other senses - hearing, smell, taste or touch. The mind which is in man, the existence of which is recognized - where is it in him? If you examine the body with the eye, the ear or the other senses, you will not find it; nevertheless, it exists. Therefore, the mind has no place, but it is connected with the brain. The Kingdom is also like this. In the same way love has no place, but it is connected with the heart; so the Kingdom has no place, but is connected with man.
"Entrance into the Kingdom is through the love of God, through detachment, through holiness and chastity, through truthfulness, purity, steadfastness, faithfulness and the sacrifice of life.
"These explanations show that man is immortal and lives eternally. For those who believe in God, who have love of God, and faith, life is excellent - that is, it is eternal; but to those souls who are veiled from God, although they have life, it is dark, and in comparison with the life of believers it is nonexistence.
"For example, the eye and the nail are living; but the life of the nail in relation to the life of the eye is nonexistent. This stone and this man both exist; but the stone in relation to the existence of man is nonexistent; it has no being; for when man dies, and his body is destroyed and annihilated, it becomes like stone and earth. Therefore, it is clear that although the mineral exists, in relation to man it is nonexistent.
"In the same way, the souls who are veiled from God, although they exist in this world and in the world after death, are, in comparison with the holy existence of the children of the Kingdom of God, nonexisting and separated from God."
−(Some Answered Questions, Pages: 241-243)
[He also speaks about our status changing in the next world, and what's required for it.]
"When they [men] are delivered through the light of faith from the darkness of these vices, and become illuminated with the radiance of the sun of reality, and ennobled with all the virtues, they esteem this the greatest reward, and they know it to be the true paradise. In the same way they consider that the spiritual punishment ... is to be subjected to the world of nature, to be veiled from God, to be brutal and ignorant, to fall into carnal lusts, to be absorbed in animal frailties, to be characterized with dark qualities ... these are the greatest punishments and tortures....
"...The rewards of the other world are the perfections and the peace obtained in the spiritual worlds after leaving this world ... the spiritual graces, the various spiritual gifts in the Kingdom of God, the gaining of the desires of the heart and the soul, and the meeting of God in the world of eternity. In the same way the punishments of the other world ... consist in being deprived of the special divine blessings and the absolute bounties, and falling into the lowest degrees of existence. He who is deprived of these divine favours, although he continues after death, is considered as dead by the people of truth.
"The wealth of the other world is nearness to God. Consequently it is certain that those who are near the Divine Court are allowed to intercede, and this intercession is approved by God....
"It is even possible that the condition of those who have died in sin and unbelief may become changed; that is to say, they may become the object of pardon through the bounty of God, not through His justice; for bounty is giving without desert, and justice is giving what is deserved. As we have the power to pray for these souls here, so likewise we shall possess the same power in the other world, which is the Kingdom of God.... Therefore in that world also they can make progress. As here they can receive light by their supplications, there also they can plead for forgiveness, and receive light through entreaties and supplications.
"Both before and after putting off this material form, there is progress in perfection, but not in state.... There is no other being higher than a perfect man. But man when he has reached this state can still make progress in perfections but not in state, because there is no state higher than that of a perfect man to which he can transfer himself. He only progresses in the state of humanity, for the human perfections are infinite. Thus however learned a man may be, we can imagine one more learned.
"Hence, as the perfections of humanity are endless, man can also make progress in perfections after leaving this world."
―Some Answered Questions, pp. 260-274 passim.