Yes. It has to be revealed, and it still has to be revealed. As I was stating elsewhere, when Thomas declared to Jesus "My Lord and my God," Jesus did not correct Him.
I believe the reason it has to be revealed is because all men would have bowed down if He had first come in power, even though they did not truly love Him. They would have bowed down only because they recognized superior power.
This is stated in 1 Corinthians 2:
6 We speak wisdom among those who are mature, yet not the wisdom of this age, nor of the rulers of this age, who are coming to nothing. 7 But we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the ages for our glory, 8 which none of the rulers of this age knew; for had they known, they would not have crucified the Lord of glory. 9 But as it is written: “Eye has not seen, nor ear heard, nor have entered into the heart of man the things which God has prepared for those who love Him.” 10 But God has revealed them to us through His Spirit.
The rulers of this age, including Pilate and the Emperor himself, would have never crucified Jesus if they knew He had far more power than they did, and could call on a legion of angels if He wanted to. Rulers are into preserving their positions of power, not dooming them to destruction, so why make someone like that your enemy? Thus, had they known, they would have laughed the Pharisees out of the building who wanted Him crucified, or worse. They made have had them killed instead, to show fealty to the Lord Jesus Christ.
But that's just it. God didn't choose the powerful of this world, He choose the lowly and the despised. When it says "We speak wisdom among those who are mature, yet not the wisdom of this age, nor of the rulers of this age, who are coming to nothing," Paul was actually speaking of Daniel 7, where it was promised long ago that the saints of God would suffer persecution at the hands of the Antichrist, but that in the end the kingdoms of this world would be handed over to them for being faithful to God, and the meek would thus inherit the earth. This is what he meant by, "Eye has not seen, nor ear heard, nor have entered into the heart of man the things which God has prepared for those who love Him." He meant their rewards when all was said and done would outweigh their sufferings, and be far better than they could have ever dreamed. It's why Paul also said, "Our light afflictions build for us a far more exceeding weight of glory."
So for the saints of God it has always been about discerning who Jesus really is, and believing it, so that when the time comes for us to be rewarded, it will be because we made Him Lord over our lives when we did not have to out of fear, but because we wanted to out of love. And this is the wisdom of God which was "hidden in a mystery."