Why did God choose her to become the mother of Jesus? No doubt because she had the spiritual qualities needed to help nurture her perfect son through childhood to maturity.
فَيَا لَلِٱمْتِيَازِ ٱلَّذِي نَعِمَتْ بِهِ أَنْ تَكُونَ أُمَّ أَعْظَمِ إِنْسَانٍ عَاشَ عَلَى ٱلْأَرْضِ !‏ —‏ مت ١ :‏ ​ ١٨ -‏ ٢٥‏ .‏