8042. 'Sanctify to Me all the firstborn' means faith - that it comes from the Lord. This is clear from the meaning of 'sanctifying' to Jehovah or the Lord, as ascribing something to Him, that is, confessing or acknowledging that it comes from Him; and from the meaning of 'the firstborn' as faith, dealt with in 352, 2435, 6344, 7035. When the term faith is used all the truth that the spiritual Church possesses is meant; and since all the truth that the Church possesses is meant, the spiritual Church itself is also meant, for truth is the essential element of this Church. Good is, it is true, the essential element of a Church, and really is the firstborn, 2435, 3325, 4925, 4926, 4928, 4930; but good as it exists among those belonging to the spiritual Church is in itself truth. For when these people act in accordance with the truth they have been taught, that truth is called good; for it has then passed from their understanding into their will, and from their will into action, and anything done which springs from the will is called good. In itself, in essence, this good is still truth, and this is because for those people things taught by the Church are truths; and since teachings within Churches are diverse, so too are truths. But in spite of that, though they vary so much, such truths become good, as has just been stated, when people will them and act them out.

[2] While a person is being regenerated he is led by means of faith in the understanding, or doctrine, to faith in the will, or life; that is, he is led through the truth of faith to the good of charity. When the good of charity resides with a person he has been regenerated; and from that good he now gives birth to truths which are called the truths of good. These are the truths which are the most authentic truths of faith; and they are meant by the firstborn. For the generations or births of truths from good are like the generations or births of sons and daughters from a parent, later on of grandsons and granddaughters, then of great-grandsons and great granddaughters, and so on. The first generation or those born from the actual parent, the generation of sons and daughters, is what is meant by 'the firstborn', however many they may be; the second and third generations are not meant, except when considered in relation to their own parents. The reason why the firstborn were consecrated to Jehovah or the Lord is that all secondary or descending generations of truths and forms of good derive their essential nature from the primary ones. This spiritual reality is at the root of the right of the firstborn spoken of in the Word.

3312. 'Dwelling in tents' means worship arising out of this. This is clear from the meaning of 'tents' as the holiness of love and of the worship arising out of this, 414, 1102, 2145, 2152. The reason 'tents' means the holiness of the worship arising is that in most ancient times the member of the Church with whom love to the Lord and consequently holy worship existed dwelt in tents and held his holy worship there. And because the holiness of love and the resulting holiness of worship started to be represented at that period by means of tents, they were commanded to make a Tent according to the pattern shown to Moses on Mount Sinai and to establish their Divine worship there. This was also the origin of the Feast of Tabernacles when they had to dwell in tents, which they were required to do so as to represent the holy worship which existed with the member of the celestial Church. From this it is evident that 'dwelling in tents' means worship.