'Look not back behind thee,' as in Genesis 19:17, means that Lot, who represents the good of charity, should not look to matters of doctrine. 'To look up,' is to look to celestial things. In Genesis 18:22, looking signifies thinking because seeing denotes understanding.

(Reference: Arcana Coelestia 2245)

3956. 'And Leah said, God has given me my reward, because I gave my servant-girl to my husband' in the highest sense means Divine Good wedded to Truth, and Truth wedded to Good; in the internal sense heavenly conjugial love; and in the external sense mutual love. This becomes clear from the meaning of 'reward'. 'Reward' is mentioned in various places in the Word, but few know what is meant there by 'reward'. It is well known in the Churches that man can merit nothing through the good deeds which he performs, for the good deeds which he performs are not his but the Lord's, and that merit-seeking or the earning of merit has man himself in view and so joins itself to self-love and to thought of superiority over others, consequently to contempt for others. Works therefore which are done for the sake of reward are not good in themselves since they do not spring from a genuine source, that is to say, out of charity towards the neighbour. Charity towards the neighbour holds within itself the desire that the neighbour will fare as well as oneself, and in the case of the angels the desire that he will fare better than themselves. Such is the nature of the affection that goes with charity. Consequently the affection that goes with charity loathes all idea of merit and so every good action done with a view to reward. Reward for people who have charity consists in their having the ability to do good, in being allowed to do it, and in the recipient's willing acceptance of it. This is the actual delight, indeed blessing, that is present with people with whom the affection that goes with charity exists.

[2] This shows what is meant by 'reward' which is mentioned in the Word, namely the delight and blessing belonging to the affection that goes with charity, or what amounts to the same, the delight and blessing belonging to mutual love, 3816, for the affection that goes with charity is one and the same as mutual love; see what has been stated already on these matters in 1110, 1111, 1774, 1835, 1877, 2027, 2273, 2340, 2373, 2400. From these paragraphs it is evident that at this point 'reward' in the external sense means mutual love. In the sense higher than this, which is the internal sense, 'reward' means heavenly conjugial love, as may be seen from what has been stated already about the heavenly marriage in 2618, 2739, 2741, 2803, 3024 (end), 3132, 3952 - that is to say, it is the joining together of good and truth, and mutual love is the offspring of that conjunction or marriage, 2737, 2738. From all this one may see that in the internal sense 'reward' means heavenly conjugial love.

[3] As regards 'reward' meaning in the highest sense Divine Good wedded to Truth, and Truth wedded to Good, this is evident from the fact that from these comes the heavenly marriage. For that union of the two exists within the Lord and proceeds from Him; and when it passes into heaven, the conjugial relationship between good and truth is effected, and through this relationship mutual love exists. From what has been stated here and in what has gone before one may see what is meant in the internal sense by these words spoken by Leah, 'God has given me my reward, because I gave my servant-girl to my husband'; 'a servant-girl' has meant an affirmative means that serves in the joining together of the external man and the internal man, 3913, 3917, 3931. So until those things meant by the sons of the servant-girls have been affirmed and acknowledged no joining together of good and truth, and so no mutual love, is able to come about, for those affirmations must of necessity come first. These are the considerations meant by these words.