The faith of the new heaven and the new church in a specific form is this: Jehovah God is love itself and wisdom itself, or goodness itself and truth itself. As divine truth, or the Word, which was “God with God,” he came down and took on a human manifestation for the purpose of forcing everything in heaven, everything in hell, and everything in the church back into the divine design. The power of hell had become stronger than the power of heaven, and on earth the power of evil had become stronger than the power of goodness; therefore total damnation stood threatening at the door. By means of his human manifestation, which was divine truth, Jehovah God lifted this pending damnation and redeemed both people and angels. Afterward, in his human manifestation, he united divine truth to divine goodness, or divine wisdom to divine love. In this way he returned to the divine nature that he had had from eternity, together with and in the human manifestation, which had been glorified. These things are meant by this statement in John: “The Word was with God, and the Word was God. And the Word became flesh” (John 1:1, 14).
And in the same Gospel, “I went out from the Father and came into the world; again I am leaving the world and am going to the Father” (John 16:28). And also by this: “We know that the Son of God came and gave us understanding so that we would know the truth. And we are in the truth in the Son of God, Jesus Christ. He is the true God and eternal life” (1 John 5:20). From all this it is clear that if the Lord had not come into the world no one could have been saved. The situation today is similar. Therefore if the Lord does not come into the world again in the form of divine truth, which is the Word, no one can be saved.
For our part, the specifics of faith are these:
(1) There is one God, the divine Trinity exists within him, and he is the Lord God the Savior Jesus Christ.
(2) Believing in him is a faith that saves.
(3) We must not do things that are evil—they belong to the Devil and come from the Devil.
(4) We must do things that are good—they belong to God and come from God.
(5) We must do these things as if we ourselves were doing them, but we must believe that they come from the Lord working with us and through us.
The first two points have to do with faith, the second two have to do with goodwill; and the fifth has to do with the partnership between goodwill and faith, the partnership between the Lord and us.
from True Christianity, Volume 1, Section 3