Matthew Henry on Isaiah 65:8-10

In the bunch of unripe grapes, at present of no value, the new wine is contained. The Jews have been kept a distinct people, that all may witness the fulfilment of ancient prophecies and promises. God's chosen, the spiritual seed of praying Jacob, shall inherit his mountains of bliss and joy, and be carried safe to them through the vale of tears. All things are for the display of God's glory in the redemption of sinners.