Job 28:21
Yea, it is hidden from the eyes of all living, and hidden from the birds of the heavens.
Psalm 49:3-4
my mouth shall speak of wise things; and the thoughts of my heart shall be of understanding.
Matthew 11:25
At that time Jesus answered and said, I thank You, O Father, Lord of Heaven and earth, because You have hidden these things from the sophisticated and cunning, and revealed them to babes.
Matthew 13:17
For truly I say to you that many prophets and righteous men have desired to see those things which you see, and have not seen them; and to hear what you hear, and have not heard them.
Matthew 13:35
so that it might be fulfilled which was spoken by the prophet, saying, "I will open my mouth in parables; I will utter things which have been kept secret from the foundation of the world."
1 Corinthians 2:7-10
But we speak the wisdom of God in a mystery, which God has hidden, predetermining it before the world for our glory;
Colossians 2:3
in whom are hidden all the treasures of wisdom and knowledge.