1799. 'Behold, a son of my house is my heir' means that in the Lord's kingdom there would be only that which is external. This is clear from the meaning in the internal sense of 'an heir' and of 'inheriting'. 'Becoming an heir' or inheriting means eternal life in the Lord's kingdom. All who are in the Lord's kingdom are heirs, for the source of the life in them is the Lord's life, which is the life of mutual love, and for that reason they are called 'sons'. The Lord's sons or heirs consist of all who have His life in them, for it is from Him that their life comes, and it is from Him that they have been born, that is, regenerated. Those born of another are that other's heirs; and so it is with all who are being regenerated by the Lord, for in that case they are receiving the life that is the Lord's.

[2] In the Lord's kingdom there are those who are external, those who are more interior, and those who are internal. Good spirits who dwell in the first heaven are external, angelic spirits who dwell in the second heaven are more interior, and angels who dwell in the third heaven are internal. Those who are external are not as close to or near the Lord as those who are more interior, and these in turn are not so close or near as those who are internal. Out of Divine love, or mercy, the Lord wills to have everyone near to Himself, so that they do not stand outside, that is, in the first heaven. His will is that they should dwell in the third heaven, and if possible not merely with Him but abiding in Him. Such is the nature of Divine or the Lord's love. But since at that time none but external things existed with the Church, He complained of this in the words that occur here - 'Behold, a son of my house is my heir' - by which is meant that in His kingdom there would thus be only that which is external. But comfort followed, and a promise of internal things, as described in the verses that follow next. What the external aspect of the Church is has been stated already in 1083, 1098, 1100, 1151, 1153.

[3] By itself doctrine does not constitute the external aspect of the Church, still less the internal, as stated above. Nor on the Lord's part is it its teachings that make one Church distinct and separate from another, but its life in accordance with those teachings, all of which, as long as they present what is true, regard charity as their basic principle. What else does doctrine do but teach men the kind of people they ought to be?

[4] In the Christian world it is their doctrines that cause Churches to be distinct and separate, and because of these they call themselves Roman Catholics, Lutherans, Calvinists or the Reformed, and Evangelicals, among other names. It is solely by reason of their doctrines that they are called by these names. This situation would never exist if they were to make love to the Lord and charity towards the neighbour the chief thing of faith. In this case their doctrinal differences would be no more than shades of opinion concerning the mysteries of faith which truly Christian people would leave to individual conscience, and in their hearts would say that a person is truly a Christian when he lives as a Christian, that is, as the Lord teaches. If this were so all the different Churches would become one, and all the disagreements which stem from doctrine alone would disappear. Indeed the hatred one man holds against another would be dispelled in an instant, and the Lord's kingdom on earth would come.

[5] The Ancient Church which existed immediately after the Flood, though scattered among many kingdoms, was of this nature. That is to say, people differed much from one another in matters of doctrine, but for all that, they made charity the chief thing. Also they regarded worship, not from the standpoint of doctrinal teachings which are matters of faith, but from that of charity which is a matter of life. This is what is meant by 'they all had one lip and their words were one', Genesis 11:1, regarding which see 1285.

457. Nearly everyone who enters the next life from the world imagines that hell is the same for everybody, and that heaven is too, when in fact there are limitless differences and variations in both. Hell is never exactly the same for one person as it is for another, and neither is heaven, just as one man, spirit, or angel is never given to be exactly like another. At my merest thought of two being exactly alike or equal, people in the world of spirits and those in the angelic heaven were horrified. They said that every unified whole is formed from the harmony of many constituent parts, and that that whole depended on this harmony. Indeed a simple whole cannot possibly exist, only a harmonized whole. Every community in heaven forms a whole in this way, and all the communities, that is, heaven in its entirety, form a whole. And all this derives from the Lord alone by means of love. A certain angel was counting up merely the most general classes of joy found among spirits, that is, among members of the first heaven. They came to about four hundred and seventy-eight. This demonstrated how countless the less general classes must be and how innumerable the divisions within each class. And with so many in the first heaven alone, how limitless must be the classes of happiness in the heaven of angelic spirits, and still more in the heaven of angels!