9373. Come up unto Jehovah. That this signifies conjunction with the Lord, is evident from the signification of “coming up,” as being to be raised toward interior things (see n. 3084, 4539, 4969, 5406, 5817, 6007), consequently also to be conjoined (n. 8760). That it denotes conjunction with the Lord, is because by “Jehovah” in the Word is meant the the Lord, (n. 1343, 1736, 1793, 2004, 2005, 2018, 2025, 2921, 3023, 3035, 5663, 6280, 6303, 6905, 8274, 8864, 9315). A secret which also lies hidden in the internal sense of these words, is that the sons of Jacob, over whom Moses was the head, were not called and chosen; but they themselves insisted that Divine worship should be instituted among them (according to wh at has been said in n. 4290, 4293); and therefore it is here said, “and He said unto Moses, Come up unto Jehovah,” as if not Jehovah, but another, had said that he should come up. For the same reason in what follows it is said that “the people should not go up” (verse 2); and that “Jehovah sent not His hand unto the sons of Israel who were set apart” (verse 11); and that “the appearance of the glory of Jehovah was like devouring fire on the top of the mountain in the eyes of the sons of Israel” (verse 17); and lastly that Moses, being called the seventh day, “entered into the midst of the cloud.” For by “the cloud” is meant the Word in the letter (n. 5922, 6343, 6752, 6832, 8106, 8443, 8781); and with the sons of Jacob the Word was separated from its internal sense, because they were in external worship without internal, as can be clearly seen from the fact that now, as before, they said, “all the words which Jehovah hath spoken we will do” (verse 3); and yet scarcely forty days afterward they worshiped a golden calf instead of Jehovah; which shows that this was hidden in their hearts while they were saying with their lips that they would serve Jehovah alone. But nevertheless those who are meant by “the called and the chosen” are those who are in internal worship, and who from internal worship are in external; that is, those who are in love to and faith in the Lord, and from this in love toward the neighbor.

7890. From the first day even unto the seventh day. That this signifies a full holy state, is evident from the signification of “seven days,” as being a holy state (of which above, n. 7885), and also as being a full state (n. 6508), which is also signified by a “week.” (That a “week” denotes an entire period greater or less, from beginning to end, see n. 2044, 3845)

It is fitting that to “sojourn” in the Bible -- to live in a foreign land -- represents instruction, learning the things represented by that area. This is used quite a bit in the early parts of the Bible, when Abraham and his immediate descendants sojourned in a variety of foreign places. It arises also later in the Old Testament, with the Israelites given rules on how to treat sojourners in their midst.

The sojourner is a person who is willing to learn and accept new spiritual truths. That's in contrast to the term "stranger", as used in the Bible. A stranger has a natural inclination to good, but is not willing to learn spiritual truths. There is a long history of using travel to round out an education, from the 19th-century “world tours” taken by Oxford and Cambridge graduates to the exchange programs and semesters abroad offered in modern school programs. The idea is pretty straightforward: by immersing ourselves in other cultures we can both learn about them and deepen our minds.