Deus caritas est, subtitled De Christiano Amore, is a 2005 encyclical, the first written by Pope Benedict XVI, in large part derived from writings by his late predecessor, Pope John Paul II. Its subject is love, as seen from a Christian perspective, and God's place within all love. Charity is one of the three theological virtues; and the other two were treated in two successive encyclicals, one signed by Benedict and one written substantially by him but signed by his successor Pope Francis . This text begins with a reflection on the forms of love known in Greek philosophy—eros, agape, philia (friendship)—and their relationship with the teachings of Jesus.

Interior life is a life which seeks God in everything, a life of prayer and the practice of living in the presence of God. It connotes intimate, friendly conversation with Him, and a determined focus on internal prayer versus external actions, while these latter are transformed into means of prayer.