Mark 10:35-40 To sit on Jesus' right and left hand

³⁵ And James and John, the sons of Zebedee, come unto him, saying, Master, we would that thou shouldest do for us whatsoever we shall desire.
³⁶ And he said unto them, What would ye that I should do for you?
³⁷ They said unto him, Grant unto us that we may sit, one on thy right hand, and the other on thy left hand, in thy glory.
³⁸ But Jesus said unto them, Ye know not what ye ask: can ye drink of the cup that I drink of? and be baptized with the baptism that I am baptized with?
³⁹ And they said unto him, We can. And Jesus said unto them, Ye shall indeed drink of the cup that I drink of; and with the baptism that I am baptized withal shall ye be baptized:
⁴⁰ But to sit on my right hand and on my left hand is not mine to give; but it shall be given to them for whom it is prepared. -Mark 10:35-40 King James Version (KJV)


Apocalypse Explained, by Emanuel Swedenborg, [1757-9], tr. by John Whitehead [1911], at sacred-texts.com
600.

...[3] As "right and left" are mentioned in many passages in the Word, and in some places "right" alone, or "left" alone, I will explain in a few words what is signified by each of them, and by the two together. This can be known from the quarters in the spiritual world, where the south is to the right, and the north to the left, and the east in front, and the west behind. An angel perpetually faces the Lord as a sun, therefore before him is the Lord as the east, and behind him the Lord as the west, and at his right hand is the south, and at his left hand the north. It is from this way of facing that the "right" signifies truth in light, and the "left" truth in shade; or what is the same, that the "right" signifies spiritual good which is truth in light, and the "left" signifies spiritual truth which is truth in shade; so, too, the "right" signifies good which is a source of truth, and the "left" truth from good. Such is the signification of all the right and left parts of the body, and also of the head; as the right and left eye, the right and left hand, the right and left foot, and so on, the proper signification of each member or part being preserved. From these few statements it can be known what "right" and "left" signify, in general and in particular, in the Word of both the New and the Old Testaments, as in the following passages... [9] In the Gospels: The mother of the sons of Zebedee asked Jesus that one of her sons should sit on the right hand and the other on the left in His kingdom. Jesus said, Ye know not what ye ask; to sit on My right hand and on My left hand is not Mine to give except to those to whom it is given by the Father (Matt. 20:20-23; Mark 10:35-40). "The mother of the sons of Zebedee," James and John, asked this, because by "mother" the church is meant; by "James" charity, and by "John" the good of charity in act; these two, or those who are in them, are at the right hand and the left of the Lord in heaven; to the right there is the south, and to the left is the north, and in the south are those who are in the light of truth from clear good, and in the north are those who are in the light of truth from obscure good. The Divine itself proceeding from the Lord as a sun produces such a Divine sphere in those quarters; for this reason none can possibly dwell there except those who are in those truths from good; this is the signification of "to sit on the right hand and on the left hand of the Lord is for those only to whom it has been given, or for whom it has been prepared by the Father;" "the Father" meaning the Divine good of the Divine love, from which is heaven and everything of heaven; so these words of the Lord mean that to sit on His right hand and on His left in the heavens is given by the Lord to those for whom it has been prepared from the foundation of the world to have an inheritance allotted to them in the south and in the north...

Arcana Coelestia, by Emanuel Swedenborg, [1749-56], tr. by John F. Potts [1905-10], at sacred-texts.com
9511.
...the Lord's right and left hands; by His "right hand" is signified the good of celestial love, which is the good of love to the Lord; and by His "left hand" the good of spiritual love, which is the good of love toward the neighbor. From this also all things on man's right side correspond to celestial good; and those on his left side to spiritual good; for all things with man correspond to heaven. Those who are in these goods are meant by "sitting on the Lord's right and left hands" in Mark: To sit on My right hand, and on My left hand, is not Mine to give; except to those for whom it hath been prepared (Mark 10:40); "to give to those for whom it hath been prepared" signifies to bestow from mercy upon those who are in the good of life and of faith (see n. 9305), thus on those who are in celestial good and in spiritual good.