From my reading yesterday morning:
Open thou mine eyes, that I may behold wondrous things out of thy law. —Psalm 119:18
Then opened he their understanding, that they might understand the scriptures. -Luke 24:45
It is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given. -Matthew 13:11
I thank thee, O Father, Lord of heaven and earth, because thou hast hid these things from the wise and prudent, and hast revealed them unto babes. Even so, Father: for so it seemed good in thy sight. -Matthew 11:25,26
We have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God. -1 Corinthians 2:12
How precious also are thy thoughts unto me, O God! how great is the sum of them! If I should count them, they are more in number than the sand. -Psalm 139:17,18
O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out! For who hath known the mind of the Lord? or who hath been his counsellor? For of him, and through him, and to him are all things: to whom be glory for ever. Amen. -Romans 11:33,34,36
I used it as part of my morning devotions with the high school students at Elliott Prairie Christian School (Facebook | Google).