Destiny cannot be fulfilled with our inborn abilities: man was created to have dominion over the things committed to him (that for which he was created), but he needed the Lord God to breath into him to be a living soul to be able to carryout his assignment. Hmmm! That is why Jesus told Nicodemus, ...that which is born of the flesh is of the flesh ...and that which is born of the Spirit is of the Spirit and except a man be born again, he cannot see the kingdom (he cannot experience his essence for existence) of God because anything born of God overcomes the world. Mary needed the Lord to come on her for her to be able to do what the Lord had chosen her for.