Albert Barnes Commentary Mark 12

Are as the angels. That is, as the angels in respect to connections and relations. What that may be, we do not know; but this passage teaches that the peculiar relation of marriage will not exist. It does not affirm, however, that there will be no recollection of former marriages, or no recognition of each other as having existed in this tender relation.

How in the bush. This refers to the events at the burning bush. See Exodus 3:6. It signifies that part of the book of Exodus which contains the account of the burning bush. When there were no chapters and verses, it was the easiest way of quoting a book of the Old Testament by its subject, and this method was often used by the Jews. See, for example, Mark 12:28–34. See also Matthew 22:34-40.

Verse 28. Perceiving that he answered them well. That is, with wisdom, and with a proper understanding of the law. In this case, the opinion of the Saviour corresponded with that of the Pharisees; and this question seems to have been one of the very few candid inquiries asked of him by the Jews for the purpose of obtaining information. Jesus answered it in a similar spirit of kindness and commended the conduct of the man.

Hear, O Israel. This was said to call their attention to the great importance of the truth about to be proclaimed. See Deuteronomy 6:4, 6.

The Lord our God, etc. Literally, "Jehovah, our God, is one Jehovah." The other nations worshipped many gods, but the God of the Jews was one, and one only. Jehovah was undivided; and it was the design of the separation of the Jewish people from other nations to keep this great truth in mind. This was the distinctive truth which was communicated to the Jews, and this they were required to keep and remember forever.

And thou shalt love. If Jehovah was the only God, then they should not love any other being supremely. Then they should not bow down before any idol. They were required to love God above all other beings or things, and with all the faculties of their minds.