What does Catholicism teach about the assumption of Mary? And why is this event contemplated in the fourth glorious mystery? Let us begin by considering a few key points from the Catechism of the Catholic Church (see 966).
First, in discussing the assumption, the Catechism affirms that Mary did not suffer from original sin but was conceived full of grace. According to this doctrine, known as the Immaculate Conception, God’s supernatural life dwelt in Mary from the very beginning of her existence.