Hence we learn [see quote from Reflections on and Admirations of God 6] how all God’s love may be resolved into His love for and delight in Himself. His love to the creature is only His inclination to glorify Himself and communicate Himself, and His delight is in Himself glorified and in Himself communicated. There is His delight in the act and in the fruit. The act is the exercise of His own perfection, and the fruit is Himself expressed and communicated. Jonathan Edwards
The quote from Edwards just above gets at several important points, but one of the main points to consider is what it means for the command to glorify God in all we do. This can be thought of in terms of love or joy. God commands His people to rejoice in Him, but where does that joy come from? If the joy comes from the human as to its origin, then the joy would be something a person gives to God that does not come from Him. If the soul has the ability to delight in God apart from the ability to delight in God that comes from God, then the soul has the ability to obey the commands of God with the power of obedience from itself. But Jesus clearly taught His people that apart from Him they could do nothing (John 15:4-5).
What we can clearly see from the quote above is that Edwards saw that anything that a human being did in the spiritual realm must come from God first. A human being does not have the power to work up spiritual things in his or her own power, but instead spiritual things that please God must come from the work of the Holy Spirit. This is to say that true spiritual fruit that comes through a human being is truly the fruit of the Spirit. When a human being loves another, that is the work of the Holy Spirit and that is the love of God for God being manifested. When a human being has true spiritual joy, that is the work and fruit of the Holy Spirit and that is the joy of God in God being manifested.
What we have, then, is a very beautiful picture. Human beings have no power or ability to glorify God as He commands them since they have no way to work any of the commands in their own power. But what God commands human beings to do, then, is to be instruments of His glory in the world. A person does not glorify God by doing what He commands in his own power of self, but God is only truly glorified when a human being is the instrument by which God manifests Himself. God exists in perfect love and joy and He is glorified in that when a human beings has that love and joy worked in him or her by God and then that love and joy flows from the throne of the living God in the human soul and is poured back out to God and to others. That is when the glory of God is manifested, but most of all it is for God Himself.
In order for this point to be crystal clear, we can think of the glory of God as being the beauty and delightfulness of God in all He is in Himself. A human being cannot be like God unless God works that in the soul of the human being. In the highest sense of the word, a human being cannot glorify God in the slightest (in this sense) since all true glory must come from God Himself. It is only when God shines out of Himself that He can truly be glorified. It is only when God shines out of Himself and communicates Himself to human beings that they can then be used to glorify Him. This is a critical point. The love that glorifies God must come from the love of God for Himself in order for Him to be truly glorified. The joy that glorifies God must come from the joy that God has in Himself in order for Him to be truly glorified.
Another point should be made for more clarity. It is not the fact that I have joy that glorifies God, not even if God is the object (in some sense) of my joy. The God is only glorified or manifested when it is the joy He has in Himself that is manifested. So God is only truly glorified in this sense in and through human beings when His joy is worked in them and then manifested through them. This is so vital if we are to understand Edwards, but more importantly if we are to understand the true nature of spiritual fruit. We cannot work spiritual fruit from self and human nature, but spiritual fruit must come from the Holy Spirit. We cannot glorify God from self and human nature, but this true glory must come from the One who alone is full of all true glory. This shows so clearly that God alone can regenerate a soul and God alone can work Himself in a soul and manifest His glory in and through that soul. Enough of the legalist and the libertine, those who love God and desire His glory should seek Christ Himself who alone is our hope of glory (Col 1:27). Enough of those who think they are saved by grace and yet sanctified by their own work. We are only sanctified to the degree that we die to self and His glory is worked in and through us.