2144. 'In the oak-groves of Mamre' means the character of the perception. This is clear from the representation and meaning of 'oak-groves', and also from the representation and meaning of 'Mamre'. What oak-groves in general represented and meant has been shown in Volume One, in 1442, 1443, and what the oak-grove of Mamre specifically represented and meant, in 1616, namely perceptions, though of a human kind such as spring from factual knowledge and from the initial rational concepts derived from that knowledge.

[2] What perception is, is totally unknown at the present day, for nobody today possesses the kind of perception that the ancient and especially the most ancient people possessed. The latter knew from perception whether a thing was good and consequently whether it was true. There was an influx from the Lord by way of heaven into the rational part of their minds, and from that influx when they thought about anything holy, they perceived instantly whether a thing was so or was not so. Later on such perception with mankind perished and people began to entertain heavenly ideas no more but only worldly and bodily ones; and when this happened the place of such perception was taken by conscience (which also is a kind of perception), for acting contrary to conscience and according to conscience is nothing else than discerning from conscience whether a thing is so or not so, or whether it ought to be done.

[3] But perception that goes with conscience does not originate in inflowing good but in truth which from earliest childhood has been implanted in the rational part of the mind in accordance with the holiness of people's worship, and after that has been confirmed; for that truth alone is believed by them to be good. Consequently conscience is a kind of perception, but it has its origin in truth such as this; and when charity and innocence are introduced into it by the Lord, the good that goes with that conscience is then brought into being. These few considerations show what perception is. Yet between perception and conscience there is a wide difference. See what has been stated about perception in Volume One, in 104, 125, 371, 483, 495, 503, 521, 536, 597, 607, 784, 865, 895, 1121, 1616; about the perception spirits and angels have, in 202, 203, 1008, 1383, 1384, 1390-1392, 1394, 1397, 1504; and about the learned not knowing what perception is, in 1387.

[4] As regards the Lord when He lived in the world, all of His thought sprang from Divine perception since He alone was a Divine and Celestial Man. For He has been the only one in whom Jehovah Himself was present and from whom His perception came, also dealt with in Volume One, in 1616, 1791. His perceptions became more and more interior the closer He came to union with Jehovah. The nature of His perception at this time becomes clear from what has been stated in Volume One, in 1616, about the oak-groves of Mamre; and then the nature of it when He perceived the things contained in this chapter is described in what follows below.

597. 'Noah' means a new Church, which must be called the Ancient Church to distinguish between the Most Ancient Church before the Flood and the Church that followed it. The states of those two Churches were entirely different. The state of the Most Ancient Church was one in which people had from the Lord a perception of good and of truth deriving from it, while that of the Ancient Church, or Noah, came to be one in which it had a conscience concerning good and truth. The nature of the difference between having perception and having conscience is what determined the difference in state between the Most Ancient Church and the Ancient.

[2] Perception is not the same as conscience. Celestial people have perception, spiritual people conscience. The Most Ancient Church was celestial whereas the Ancient was spiritual. The Most Ancient Church possessed immediate revelation through direct contact with spirits and angels, and also through visions and dreams from the Lord. These experiences enabled them to know in a general way what good and truth were, and once they knew them in this general way their general or so to speak primary matters of knowledge were confirmed by means of countless details acquired through perceptions. These countless details constituted the particular and the individual aspects of the general knowledge to which they had reference. In this manner general or so to speak primary knowledge was being corroborated day by day. If anything was not in keeping with general matters of knowledge they perceived that it was not; and if anything was in keeping they perceived that it was. Such is also the state of celestial angels.

[3] The general, so to speak primary, matters of knowledge of the Most Ancient Church were celestial and eternal truths: for example, that the Lord governs the whole universe; that the Lord is the source of all good and truth; that the Lord is the source of all life; that man's proprium was nothing but evil, and in itself something dead; in addition to other general truths such as these. And they received from the Lord a perception of countless considerations confirming and harmonizing with these truths. For those people love was the chief thing of faith, and through love they were allowed by the Lord to perceive anything that was a matter of faith. Consequently faith to them was love, as stated already. The Ancient Church however became entirely different. That difference will in the Lord's Divine mercy be discussed later on.