Charles Spurgeon Commentary Isaiah 59:19-21

"So shall they fear the name of Jehovah from the west, and his glory from the rising of the sun; for he will come as a rushing stream, which the breath of Jehovah driveth. And a Redeemer will come to Zion, and unto them that turn from transgression in Jacob, saith Jehovah. And as for me, this is my covenant with them, saith Jehovah: my Spirit that is upon thee, and my words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed`s seed, saith Jehovah, from henceforth and for ever." — Isaiah 59:19-21 (ASV)

When the enemy shall come in like a flood, the Spirit of the LORD shall lift up a standard against him. And the redeemer shall come to Zion, and unto them that turn from transgression in Jacob, saith the LORD. As for me, this is my covenant with them, saith the LORD; my spirit that is upon thee, and my words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed's seed, saith the LORD, from henceforth and for ever.

The Church of God shall have the Spirit of truth and the Word of truth ever abiding in her midst. God will not break his covenant by withdrawing his Spirit from his Church.

The Redeemer has come, and his work of redemption is accomplished. The Spirit also has come, but his work is not yet done; it is being performed from day to day, and the Spirit will never be withdrawn while any part of his ministry remains unfulfilled.

The consequence of all this is the glory of the true Church of the living God. There are better days coming for the cause of Christ and of truth. Listen, and be encouraged, all you who are heavy of heart!