Divine Love and Wisdom #357
357. I need to add that I have seen people in the spiritual world who, on the basis of their observations of the world, had decided in favor of nature to the point of becoming atheists. In spiritual light, their intelligence seemed to be open downward and closed upward because in thought they were looking down to the earth and not up to heaven. The upper surface of their sensory functioning, which is the lowest level of intelligence, seemed to have a kind of covering on it. For some people, it flashed with hellfire, for some it was black as soot, and for some it was leaden and corpselike. Beware of decisions in favor of nature, then. Decide for Divinity: there is no lack of material.
The New Jerusalem and its Heavenly Doctrine #173
173. XIII. REGENERATION.
He who does not receive spiritual life, that is, who is not begotten anew by the Lord, cannot come into heaven; which the Lord teaches in John:
Verily, verily, I say unto thee, except anyone be begotten again, he cannot see the kingdom of God (3:3).