Selection from Arcana Coelestia ~ Emanuel Swedenborg
That which makes heaven with man also makes the Church, for the Church is the Lord's heaven on earth.That is called the Church where the Lord is acknowledged, and where the Word is; for the essentials of the Church are love to the Lord from the Lord, and faith in the Lord from the Lord; and the Word teaches how a man must live in order that he may receive love and faith from the Lord.
The Lord's Church is internal and external —
• Internal with those who do the Lord's commandments from love, for these are they who love the Lord • External with those who do the Lord's commandments from faith, for these are they who believe in the Lord.
In order that the Church may exist — there must be doctrine from the Word, because without doctrine the Word is not understood. Yet doctrine alone in a man does not make the Church in him but a life according thereto. From this it follows that faith alone does not make the Church but the life of faith which is charity.
The genuine doctrine of the Church is the doctrine of charity and at the same time of faith, and not the doctrine of faith without that of charity; for the doctrine of charity and at the same time of faith is the doctrine of life; but not the doctrine of faith without the doctrine of charity.
Those who are outside the Church, and yet acknowledge one God, and live according to their religion in a kind of charity toward the neighbor, are in communion with those who are of the Church, because no one is condemned who believes in God, and lives well. From this it is evident that the Lord's Church is everywhere in the whole world, although specifically it is where the Lord is acknowledged, and where the Word is.
Everyone in whom the Church is, is saved. But everyone in whom the Church is not, is condemned.
(from Arcana Coelestia 10760-10766)