Isaiah 65

2 comments from the early church. Read Isaiah 65

Verse 20

It is usual for the prophets thus to mingle metaphorical and literal expressions. Yet, anyone with serious purpose and a little useful and salutary effort can discern the prophet's spiritual sense; it is only a lazy and worldly person or one who is ignorant or uneducated who will rest content with the literal and superficial sense and refuse to penetrate the deeper meaning.
Augustine of Hippo · d. 430City of God

Verse 22

"As in the days of the tree of life, so shall be the days of my people." Now, anyone who has ever opened the Scriptures knows where God planted the "tree of life." It was from the fruit of this tree that God excluded Adam and Eve.…Of course, it might be argued that those "days of the tree of life" mentioned by Isaiah are the days that are now being spent by Christ's church, since the "tree of life" is simply a prophetic figure for Christ, for that Wisdom of God that Solomon had in mind when he said that Wisdom is "a tree of life to them that laid hold on it."
Augustine of Hippo · d. 430City of God