The Catechism begins, not with a discourse on God, but with a consideration of the human heart. In our hearts we find the longing that leads to faith and we find that being with God is the only way to happiness. Main themes: The Inborn Hunger for God The Response to Revelation is Faith Made in God’s Image The Human Inclination to Sin Mercy, Grace, and Sin The Dignity of the Human Person The Communion of Saints and the End of Life