Adam Clarke on Isaiah 65:8

A blessing is in it - The Hebrews call all things which serve for food ברכה berachah, "a blessing." On this verse Kimchi remarks: "As the cluster of grapes contains, besides the juice, the bark, and the kernels, so the Israelites have, besides the just, sinners among them. Now as the cluster must not be destroyed because there is a blessing, a nutritive part in it; so Israel shall not be destroyed, because there are righteous persons in it. But as the bark and kernels are thrown away, when the wine is pressed out, so shall the sinners be purged away from among the just, and on their return from exile, shall not be permitted to enter into the land of Israel;" Eze 20:38.

For my servant's sakes "For the sake of my servant" - It is to be observed that one of the Koningsburg MSS. collated by Lilienthal points the word עבדי abdi, singular; that is, "my servant," meaning the Messiah; and so read the Septuagint, which gives a very good sense. In two of my old MSS. it is pointed עבדי abadai, and עבדי abdi, "my servant, "this confirms the above reading.