3843. To give the younger before the firstborn. That this signifies that the affection of interior truth should precede the affection of external truth, is evident from the representation of Rachel, who is here the "younger," as being the affection of interior truth (see n. 3758, 3782, 3793, 3819); and from the representation of Leah, who is here the "firstborn," as being the affection of external truth (n. 3793, 3819). From this it is evident that "to give the younger before the firstborn" signifies that the affection of interior truth should precede the affection of external truth. How the case herein is was briefly explained above (n. 3834); and may be further seen from the following. He who knows not the state of man, may believe that there is conjunction with truths not only external but also internal when he is acquainted with both kinds, or has both in his memory. Nevertheless there is no conjunction until the man lives according to them, for the life shows the conjunction.
 Truth is in this respect like everything else that is implanted in man from childhood, namely, that it does not become his own until he acts according to it, and this from affection, in which case his will becomes imbued with it, and it is then no longer brought into act from memory-knowledge or doctrine, but from a certain delight that is unknown to him; and as it were from his disposition or nature; for everyone acquires for himself such a nature by frequent use or habit, and this from the things which he has learned. Therefore conjunction with truths cannot take place with a man until those things which he has learned by means of doctrines have been insinuated from the external man into the interior man. When they are in the interior man, the man no longer acts from the memory, but from his own nature, until at last the things thus insinuated flow spontaneously into act, being inscribed on the man's interior memory; and that which comes forth from this, appears as if it were innate. This may be seen from the languages a man has learned in childhood, and also from the faculty of reasoning, and likewise from conscience. Hence it is manifest that truths of doctrine, even those which are interior, are not conjoined with a man until they are of the life. But concerning these matters, of the Lord's Divine mercy more shall be said elsewhere.