Another fine entry. Baruch, especially the 3rd and 4th chapters, are especially important in early Christological debates.
God did not choose them, or give them the way to knowledge; so they perished because they had no wisdom, they perished through their folly. Who has gone up into heaven, and taken her, and brought her down from the clouds? Who has gone over the sea, and found her, and will buy her for pure gold? No one knows the way to her, or is concerned about the path to her.
But the one who knows all things knows her, he found her by his understanding. The one who prepared the earth for all time filled it with four-footed creatures; the one who sends forth the light, and it goes; he called it, and it obeyed him, trembling; the stars shone in their watches, and were glad; he called them, and they said, “Here we are!” They shone with gladness for him who made them. This is our God; no other can be compared to him. He found the whole way to knowledge, and gave her to his servant Jacob and to Israel, whom he loved. Afterward she appeared on earth and lived with humankind. (Bar 3:27-37 NRSV)
5. But what is meant, says he, in the other passage: “This is God, and there shall none other be accounted of in comparison of Him?”7 That said he rightly. For in comparison of the Father who shall be accounted of? But he says: “This is our God; there shall none other be accounted of in comparison of Him. He hath found out all the way of knowledge, and hath given it unto Jacob His servant, and to Israel His beloved.” He saith well. For who is Jacob His servant, Israel His beloved, but He of whom He crieth, saying, “This is my beloved Son, in whom I am well pleased: hear ye Him?”8 Having received, then, all knowledge from the Father, the perfect Israel, the true Jacob, afterward did show Himself upon earth, and conversed with men. And who, again, is meant by Israel9 but a man who sees God? and there is no one who sees God except the Son alone, the perfect man who alone declares the will of the Father. For John also says, “No man hath seen God at any time; the only-begotten Son, which is in the bosom of the Father, He hath declared10 Him.”11 And again: “He who came down from heaven testifieth what He hath heard and seen.”12 This, then, is He to whom the Father hath given all knowledge, who did show Himself upon earth, and conversed with men.