Revelation 22:2 - Ellicott's Commentary On The Whole Bible

In the midst of the street of it... — Or rather, In the midst of the street of it, and of the river, on one side and on the other (was) a tree of life, yielding twelve fruits, according to each month giving its fruit; and the leaves of the tree are for healing of the nations. The hunger as well as the thirst of the spirit is to be satisfied (Matthew 5:6). The tree of life, as well as the river of life, is to be found in the new and better Eden (Genesis 2:9; Genesis 3:22). The vision of Ezekiel is exactly parallel to the present: “On the border of the river there was wood very much, on both sides: every kind of tree; its leaf withers not, and its fruit ceases not; all months does it ripen; its fruit serves for food, and its leaf for healing” (Ezekiel 47:7-12). The twelve manner of fruit: The recurrence of the number — twelve — is to be noticed, for here, too, as well as in the foundations and gates of the city, we have variety allied with unity. Diverse and seasonable fruits, and yet one tree of life. Thus does the Almighty wisdom feed His people with food convenient for them (Proverbs 30:8), though, in one sense there is but one food for all (John 6:31); for true divine wisdom is a tree of life to them that lay hold upon her (Proverbs 3:18). That wisdom is not the mere knowledge of things (the tree of the knowledge of good and evil has no place in new Eden); but it is rather the knowledge of life which makes the knowledge of things available to the highest good. (Comp. 1 Corinthians 1:22-24; 1 Corinthians 1:30; James 3:17; Proverbs 8)