To the Unknown God. Yes, before the coming of Christ, God was an Unknown God for people.

But in order to accept all this as an indisputable truth, in order to believe it, it is necessary to be convinced that Jesus Christ could not speak unrighteousness; but even such a conviction is not enough: it is necessary to be convinced that when He preached, He did not err, but knew for certain everything He spoke about, and since only God could know this, then we must believe in Him as in the incarnate God. Studying His life, teaching, and the miracles of His omnipotence, we must admit that He was not only a man, but also God, that is, the God-man; and His resurrection should finally strengthen this faith in us. Having reached such faith, and consequently to the knowledge of God's will, we can already consciously do God's works, that is, fulfill His will.

That is why Jesus says:

so that you can

to do the works of God, it is necessary first of all,

that you may believe in Him whom He has sent.

Jesus said this to those whom he had just miraculously fed with five loaves and two fishes. But this miracle was not enough for them. Moses brought down manna from heaven and fed it to all the Jewish people for forty years, and the Messiah, according to the teaching of the rabbis, will also nourish the Jews; Therefore, what does it mean, in comparison with such constant feeding of all Jews, that only a few thousand people were miraculously fed once? "Thus reasoned the ungrateful and hard-hearted Jews, and they said to Jesus: 'Our fathers believed, and we believe, that Moses was sent from God, because he gave proofs of it by bringing down manna from heaven, which our fathers ate in the wilderness; and what sign wilt thou give us? What are you doing so that we may believe you, that you also are sent from God?"

Discourse on the Bread of Life