It is the glory of God to conceal things, but the glory of kings is to search things out. - Pro 25:2 ESV
It all comes down to the receptivity of the heart. If you approach the Bible prayerfully, with the goal of knowing God more intimately, it will open its secrets to you, because that is the will of God.
I in them and You in Me, that they may be perfected in unity, so that the world may know that You sent Me, and loved them, even as You have loved Me. - Jhn 17:23
Too many only want to find facts about God, rather than meeting God himself in His pages. They might want to support doctrine, or the timing of last things, and are looking for proof texts. We have the fruit to show for it, in a church too often consuming itself with bickering.
Who among you is wise and understanding? Let him show by his good behavior his deeds in the gentleness of wisdom. But if you have bitter jealousy and selfish ambition in your heart, do not be arrogant and [so] lie against the truth. This wisdom is not that which comes down from above, but is earthly, natural, demonic. For where jealousy and selfish ambition exist, there is disorder and every evil thing.
But the wisdom from above is first pure, then peaceable, gentle, reasonable, full of mercy and good fruits, unwavering, without hypocrisy. And the seed whose fruit is righteousness is sown in peace by those who make peace. - Jas 3
God will allow us to get drawn out. As we seek Him all manner of hidden issues can surface. That's where perseverance and patience come in (Lk 18.1-ff). But we are promised He will reward those who truly seek Him (Heb 11.6).