Mary and the incarnation
Mary’s role is inseparable from Christ. Her free response to God, virginal motherhood, and unique preparation by grace serve the incarnation. Calling her Mother of God affirms the identity of the child she bore; it does not mean she originated the divine nature. The Immaculate Conception concerns Mary’s own beginning, not Jesus’ virginal conception.
Follow the sources
An original library introduction, with sources for further study. This is a starting point rather than a complete treatment or a finished formation lesson.