“You [also] gave Your good Spirit to instruct them,
You did not withhold Your manna from their mouth,
And You gave them water for their thirst. – Nehemiah 9:20
Yea, to every good soul, that they might be all taught of God, led into all truth and holiness, Ephesians 5:9. For which end God hath promised to pour his Spirit upon all flesh, that is, the best thing upon the basest, Joel 2:28. Next to the sending of his Son in the flesh (which is called the gift, John 4:10, and the benefit, 1 Timothy 6:2), what can God do more for his people than to give them his good spirit? this is to give them all good things in one, Matthew 7:11, Luke 11:13. – John Trapp
This is a statement of the fact that the Lord gave His Spirit to the patriarchs and prophets and leaders of these centuries before Christ. That those men and women who were always looked upon as so illustrious, so extraordinary, so miraculous in their lives, won their triumphs through grace, and their victories were due to the fact the Lord gave His “good Spirit” to instruct them. All their victories and achievements are traceable to this secret. It was the Spirit of the Lord who gave them their success. There are comparatively few today who are willing to give honour where honour is due. We hear much said of the triumph of human character and of human wisdom and of human genius, but none of these can truthfully be said to have figured in the lives of the greatest men and women of the greatest times of the past. All they were and all that they did was due to the fact that God gave them His “good Spirit.”
When God took to Himself a peculiar people, the Holy Spirit was pleased to be especially present with them.
Here both intelligence and goodness are ascribed to the Holy Spirit. There are some who tell us that while it is true the personality of the Holy Spirit is found in the New Testament, it is not found in the Old. But it is certainly found in this passage. As a matter of course, the doctrine of the personality of the Holy Spirit is not so fully developed in the Old Testament as in the New. But the doctrine is there. – R.A. Torrey