In Genesis 19:37; 21:26; 30:32; 40:7; Matthew 6:30; Luke 12:28, this signifies the perpetuity and eternity of a state. (Arcana Coelestia 2838)

In Psalm 2:7, this signifies in time; for with Jehovah the future is present. (True Christian Religion 101)

The expression 'even to this day' or 'today' sometimes appears in the Word, as in Genesis 19:37-38, 22:14, 26:33, 32:32, 35:20, and 47:26. In a historical sense, these expressions have respect to the time when Moses lived, but in an internal sense, 'this day' and 'today' signify the perpetuity and eternity of a state. 'Day' denotes state, and likewise 'today,' which is the current time. Anything related to time in the world is eternal in heaven, and to represent this, 'today' or 'to this day' is added. Although, in the historical sense, this appears as if the expressions only have a literal meaning, just like it says in other parts of the Word, such as Joshua 4:9, 6:25, 7:20, Judges 1:21, 26, etc. 'Today' means something perpetual and eternal in Psalms 2:7, 119:89-91, Jeremiah 1:5, 10, 18, Deuteronomy 29:9-14, Numbers 28:3, 23, Daniel 8:13, 11:31, 12:11, Exodus 16:4, 19, 20, 23, John 6:31, 32, 49, 50, 58, Matthew 6:11, and Luke 11:3.

(Reference: Arcana Coelestia 2838 [1-4], Genesis 47:26)

2021. 'For an eternal covenant' means conjunction with these people. This is clear from the meaning of 'a covenant' as conjunction, dealt with already in 665, 666, 1023, 1038; and that this conjunction is with those called 'the seed' is clear from the fact of its coming immediately after a reference to that 'seed', and of its being a second mention in this verse of a covenant. Thus the first mention of 'a covenant' has reference to the union of Jehovah with the Human Essence, and the second to the conjunction with those who are 'the seed'. To allow a clearer idea of the union of the Lord's Divine Essence with the Human Essence and of the conjunction of the Lord with the human race by means of the faith that inheres in charity, let the term union here and from now on be used to describe the first of these, and conjunction the second. Indeed the bond between the Lord's Divine Essence and Human Essence really was a union, but that between the Lord and the human race by means of the faith that inheres in charity is conjunction. From this it is clear that because Jehovah or the Lord is Life, His Human Essence became Life as well, as shown above. It was a union of life with life. Man however is not life but a recipient of life, as also shown already. When life flows into a recipient of life conjunction takes place, for life accommodates itself to the recipient as active does to passive or as that which in itself is living does to that which in itself is dead but made living from that which in itself is living. In the case of the principal and the instrumental, as they are called, they do indeed seem to have been joined together to exist as one. Nevertheless they are not one, for each exists by itself. Man does not live of himself, but the Lord in His mercy links him to Himself and in so doing causes him to live for ever. And because the Lord and man are distinct and separate from each other the term conjunction is used.