Think about this...I was talking about this with my wife earlier tonight. Paul, that is to say Saul, stood and held the coats of those who stoned Steven.
Saul was a zealous and adamant opponent of everything "Christian." He wanted to eradicate Christians. Yet Jesus miraculously revealed himself, in his heavenly glory none the less, to Saul, WHY? Because Jesus read his heart! In any event, what is the pattern in the Bible from Jehovah about who he gives his spirit too? He PROVES IT! EVERY SINGLE TIME! So, it makes perfect sense to me, the "Two Witnesses" will PROVE by means of "powerful signs", that they are Christ's brothers! Ther3e will be NO QUESTION, at least none to honest hearted people!