Christ coming to this earth to save sinners was (and is) a great act of grace on God's part. God doing what we could never do, nor deserve to receive. But sometimes we act as though the Grace of God acted in regards to our salvation, but then the rest of our life is lived in relative agnosticism - "who knows if God is part of all of this?" 

But the Scriptures make it clear that God wants His grace to infiltrate our entire life, not just the moment of our conversion.