3819. 'The name of the elder was Leah' means the nature of the affection for external truth; 'and the name of the younger Rachel' means the nature of the affection for internal truth. This is clear from the representation of 'Leah' as the affection for external truth, and of 'Rachel' as the affection for internal truth, both dealt with in 3793; and from the meaning of 'the name' as the nature of, dealt with in 144, 145, 1754, 1896, 2009, 2724, 3006. Leah is called 'the elder' because external truth is learned first, and Rachel 'the younger' because internal truth is learned from then on after that; or what amounts to the same, a person first of all feels an affection for external truths, and from then on after that an affection for internal truths. external truths provide the basic outline for internal truths, for they are the general outlines into which particular details are added. Unless a person has a general outline of the idea of a thing he does not make sense of any particular aspect of it. This explains why the literal sense of the Word contains general truths but the internal sense particular truths. General truths are called external, but particular truths internal. And because truths devoid of affection are not truths because there is no life to them, the affections for them are therefore meant when external and internal truths are referred to.

3868. 'She conceived again and bore a son' means spiritual conception and birth from what is external towards things that are more internal still. This is clear from what has been stated above in 3860, where the same words occur. An advance is said to be made from what is external towards things that are more internal still when that advance is from knowledge, which is a property of the understanding, to the will; or spiritually speaking, from truth which is the truth of faith to charity. For the understanding is that which proceeds from the will and gives the will a certain visual form, as faith in a similar way proceeds from charity and gives charity a certain outward form. From this it is evident that the external manifestation of the will is the understanding and the external manifestation of charity is faith. Or what amounts to the same, it is evident that the internal substance of the understanding is the will and the internal substance of faith is charity. Consequently an advance from what is external to things that are more internal still consists in an advance from faith in the understanding to faith in the will, and so from faith to charity - which is represented by 'Levi', dealt with shortly below.

[2] It should be recognized that when distinguished from charity the word faith is used to mean truth, such as the truth of doctrine, that is, such as is incorporated in the confession called the Apostles' Creed. This usage is in accord with the general meaning the word has in the Church, for the belief is that possessing faith in truths constitutes the faith through which salvation comes. Few know that faith is trust and confidence, and among these few fewer still know that trust or confidence originates in charity and is unable to exist with anyone who does not possess the life of charity.