17:16 bless her. Sarah (with a new name meaning “princess”) was blessed first by a miracle (probably at the time of Genesis 18:14) that rejuvenated her body, enabling her to have a son long after it seemed biologically possible. As Isaac became a type of Christ, so she became a type of Mary, and is considered to be a spiritual mother of believers as Abraham was their spiritual father (note I Peter 3:6; Hebrews 11:11-12).