E. The 'New Ark of the Covenant', the vessel that was to 'contain' the 'WORD', Jesus Christ incarnate, had to be 'made' without blemish also. The 'New Ark of the Covenant' was Mary. She was to give birth to the 'WORD', Jesus Christ. She had to be 'Immaculately Conceived' to satisfy the fact that GOD cannot coexist with sin. At first it looks like Jesus had brothers and sisters.
Lets look at the definitions.
They were 'fellow men'. This makes the word 'brother' a non-argument. The verse means, 'the gulf between creatures and GOD is too wide to be bridged unless GOD Himself transforms us'. B. Jesus Christ ascended into Heaven body and soul. This verse could apply to Mary as well as to the 'Messiah'.