Covenant of Grace - Westminster Confession 7.3-4

The most important question that a person ever asks is, “What can I do to be saved?” Our hearts reply, “Keep the law.” But we can't and we don't, so death reigns over us. But God in his grace has given a new covenant to replace the Covenant of Works. Why? To defend his own glory and because he is gracious and kind. The heart of the Covenant of Grace is that God freely offers to sinners life and salvation in Jesus Christ. We pay nothing, we do nothing to earn this salvation. Faith in Christ alone is required. God gives his Spirit to men dead in sin, making them alive to believe. All whom God has given to Christ will come to him, and he will turn away no one who comes to him. This covenant went into effect with Christ's death, just as a will goes into effect when a person dies. So the Greek word diatheke which translated the Hebrew berith for covenant points to the blood of Christ as the crucial gift which frees all who believe in him. A summary of the Bible is that God is good, believe it. And the proof of God's goodness to us is his gift of his Son to live and die for us. That goodness is the heart of the Covenant of Grace.