It would be difficult to find a better summary of what Desiring God is all about than from this quote taken from the writings of Puritan Thomas Watson:
We glorify God by working out our own salvation. God has twisted together, his glory and our good. We glorify him by promoting our own salvation. It is a glory to God to have multitudes of converts; his design of free grace takes effect, and God has the glory of his mercy; so that, while we are endeavoring our salvation, we are honoring God.
What an encouragement is this to the service of God, to think, "while I am hearing and praying, I am glorifying God; while I am furthering my own glory in heaven, I am increasing God's glory!"