1 Enoch 63:3
1 In those days, the mighty and the kings who rule the earth will beg Him for a brief respite from His angels of punishment, to whom they were delivered, so they might kneel and worship before the Lord of Spirits, and confess their sins before Him. 2 They will praise and exalt the Lord of Spirits, saying: 'Blessed is the Lord of Spirits and the Lord of kings, the Lord of the mighty and the Lord of the wealthy, the Lord of glory and the Lord of wisdom, 3 and magnificent in every hidden aspect is Your power from generation to generation, and Your glory forever and ever: Deep are all Your secrets and countless, and Your righteousness is beyond measure.' 4 We now understand that we should praise and bless the Lord of kings and Him who is king over all kings.'
1 Corinthians 2:10
9 But just as it is written, “Things that no eye has seen, or ear heard, or mind imagined, are the things God has prepared for those who love him.” 10 God has revealed these to us by the Spirit. For the Spirit searches all things, even the deep things of God. 11 For who among men knows the things of a man except the man’s spirit within him? So too, no one knows the things of God except the Spirit of God.
Notes and References
"... "... In 1 Corinthians, Paul states that it is the rulers of this age who do not understand the mystery, for if they did, the rulers would not have crucified Jesus. Therefore, the 'rulers' played a part in history (the crucifixion of Jesus) that related to the mysterion ... In 1 Corinthians 2:8 'the Lord of Glory' is the title for Jesus, since the phrase 'the Lord of Glory' is connected with the word 'crucified'. Many scholars attribute the phrase 'the Lord of Glory' in 1 Corinthians to 1 Enoch. But there, unlike 1 Corinthians, the phrase 'the Lord of Glory' is a title given to God. In 63:2-3, there is a connection between 'the Lord of Glory' and mysterion (the same as Paul) ... Also, there is a connection between the mysterion and how it is 'deep.' In 1 Corinthians 2:10, the Spirit searches out the 'depth of God.' Even though the Spirit is the one who searches out the depth of God, what is important is the fact that (like 1 Enoch 63:2) Paul also maintains this idea that the mysteries of God are deep ..." ..."
Fraser, Christopher Gary The Jewish and Hellenistic Influences on Paul: A Case Study of "Mysterion" (p. 119) University of Windsor, 1998