Are all these things in the Bible?
Yes, they are.
The reason they are not easily seen when we go through Scriptures is because Satan and wicked spirits (Eph. 6:12) blinded the eyes of our understanding, thus darkening our minds not to prosper in the comprehension of God (2 Cor. 4:4).
By reason of the fall of man in the beginning, man was trained by these wicked spirits to be carnal in his understanding. Though he might be sincere, a carnal man would naturally drag things spiritual to the level of his own understanding—by default.
What God calls ‘A’, a carnal man would naturally call it ‘Z’; he cannot help it. 1 Cor. 2:14 says, “But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned”.
Though a carnal man might excel in the reading of scriptures, but if he has not been healed of the blindness of his heart, he would read and not see (or understand). In hearing, a carnal man would hear (these truth) and not understand (Matt. 13:13).
No matter what he does, he cannot see these precious treasures of the word of God (2 Pet. 1:4a), because he doesn’t even know that there are any treasures to be discovered in the first place.
For this reason, one of the major commissions of the New Testament and one of the major reasons for the New Birth is to have the eyes of our understanding opened—or enlightened (Eph. 1:15-20).
Jesus’ pattern has always been to raise men, deal with them for the opening of their eyes and give them back to His body to, in turn, open the eyes of others (Acts 26:18, Eph. 4:8-14). Also, we must always remember that these things which are not easily seen in scriptures are precious things that are of great price in the sight of God.
They are precious things which, though God wants all men to see (1 Tim. 2:1-4, 2 Pet. 3:9), it is still in His jurisdiction to reveal it to anyone. That jurisdiction is what is called ‘Mercy’. Romans 9:15-16 says, “For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.
So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.” It does not matter how wise a man is or how noble or righteous he might be. It does not matter how willing he is or how fast he is willing to run—if God holds these things back in Mercy, they cannot be seen (Matt. 11:25, 13:16-17, 16:13-17, Lk. 10:21, Jn. 12:38-40, 1 Cor. 1:19-31).
Thus, we must be humble before God and before His Word, seeking His Mercy always.