2054. 'As an eternal covenant' means conjunction. This is clear from the meaning of 'a covenant' as conjunction, dealt with already. The subject here being those inside the Church, the word 'covenant' is repeated, though this time it is called 'an eternal covenant'. It is repeated not only because it is absolutely vital for people inside the Church to be circumcised, that is, to be purified from self-love and love of the world, as shown above in 2051, but also because the conjunction of the Lord and of His heaven with those inside the Church is the closest of all since it is effected through the goods and truths of faith. There is, it is true, a conjunction as well with those outside the Church, but that is more remote because the goods and truths of faith do not exist with them, as stated above in 2049. In the Lord's kingdom the Church is like the heart and lungs in man. Man's interior things are joined to those that are external by means of the heart and lungs, and in this way all the surrounding organs get their life. So it is with the human race as well. The conjunction of the Lord and of His heaven is closest with the Church, but more remote with those outside the Church who are like the organs which live by means of the heart and lungs. Celestial people resemble the heart, but spiritual people the lungs. The necessity for both of these to be purified is the reason why those inside the Church are dealt with specifically here and why the covenant is referred to twice.