The following are just a few examples of Scripture affirming this

Psalm 119:18 Open my eyes, that I may see wondrous things out of your law.

Matthew 11:25  . . . I thank you, Father, Lord of heaven and earth, that you hid these things from the wise and understanding, and revealed them to infants.

Matthew 16:17  . . . Blessed are you, Simon Bar Jonah, for flesh and blood has not revealed this to you, but my Father who is in heaven.

Luke 24:45 Then he opened their minds, that they might understand the Scriptures.

John 6:45 It is written in the prophets, ‘They will all be taught by God. . . .

John 14:26 But the Counselor, the Holy Spirit, whom the Father will send in my name, will teach you all things . . .

2 Corinthians 3:14; 4:3 But their minds were hardened, for until this very day at the reading of the old covenant the same veil remains, because in Christ it passes away. . . . Even if our Good News is veiled, it is veiled in those who are dying

Ephesians 1:16-17  . . . my prayers, that the God of our Lord Jesus Christ, the Father of glory, may give to you a spirit of wisdom and revelation in the knowledge of him,

Colossians 1:26 the mystery which has been hidden for ages and generations. But now it has been revealed to his saints (Emphasis mine.)