Hello Family of God,
What God has revealed to His chosen people is contained in Holy Scripture; However, there are mysteries hidden in secret which God Himself will not disclose at this present time (Deut. 29:29; Dan. 2:22; Mk. 13:32; Lk. 8:17; 1 Cor. 4:5; 13:12; Eph. 1:9; Col. 1:26; 1 Tim. 5:24-25; Rev. 10:4). We want to make absolutely certain that if anyone claims to have "hidden or secretive" knowledge that is NOT revealed in the Word of God, that we are to examine such claims utilizing hermeneutics and careful exegesis, and with every precautionary measure available to us. Scripture has to be understood in its context (i.e., BOTH cultural and historical), as CONTEXT IS KING; systematic theology and authorship of the books contained in the bible should also be employed to attain the perspicuity of biblical interpretation concerning the Totality of Scripture and its meaning.
"But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him. But God hath [REVEALED THEM TO US BY HIS SPIRIT]: for the Spirit searcheth all things, yea, the deep things of God" (1 Corinthians 2:9-10)
This passage cited by our beloved brother Paul is taken from Isaiah 64:4, and it is often misinterpreted by many bible teachers and Pastors who interpret this to refer to the unimaginable beauty, splendor, and wonders of Heaven that awaits all who love the Lord. This is NOT what this text is referring to as the context clearly says that this is a "revealed" truth and wisdom from God which is not understood by the natural man; this is a TRUTH which is both objective and verifiable, and the unconverted man cannot rationalize this with his eyes, ears, or his mind. Only the Holy Spirit of God can illuminate the minds of fallen man to understand the depths of the treasures concerning the Wisdom and Knowledge revealed in His Word (Matt. 13:11-15; Rom. 11:25; 1 Cor. 2:14-15; Eph. 3:3-7; 1 Jn. 2:27).
"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? Or who hath first given to him, and it shall be recompensed unto him again? For of him, and through him, and to him, are all things: to whom be glory for ever. Amen." (Romans 11:33-36)
What God has revealed to His children through His wisdom, knowledge, and judgments are precious and indispensable truths which surpass any human understanding (cf. 1 Sam. 2:3; 1 Kgs. 8:39; Job 5:9; 9:10; 26:14; Ps. 36:6; 44:21; 104:24; 147:5; Dan. 2:20; Eph. 3:10; Rev. 7:12). His Eternal purposes and Divine Decrees will be fulfilled as He is the Sustainer of all things in existence (cf. 1 Cor. 8:6; 15:28; Eph. 1:23; 4:6; Heb. 2:10).