As Scripture says : Eye has not seen, ear has not heard, nor has it dawned on the mind what God has prepared for those who love him. 1 Corinthians 2:9
Only the own spirit of a person knows the secrets of himself. Similarly, no one but the Spirit of God knows the secrets of God. To know God means to know the ways of God and his plan of Salvation.
But ordinarily it is difficult to express what God has given us to know and experience. We can only transmit spiritual wisdom to those who have reached spiritual maturity. The mystery and secret plan of divine wisdom which God destined from the beginning is not a wisdom of this world or of its rulers.
Paul gave us an example when he came to reveal the mystery of God’s plan. He did not count on eloquence or an intellectual approach. He was weak, fearful and trembling. It was rather, a demonstration of Spirit and power. By the power of Spirit, the power of prayer and the power of suffering, we can expect everything. Even healing can miracles take place in his presence those whom God has prepared.
God in his goodness has given us his revelation through his Spirit because the Spirit probes everything, even the depth of God. No ruler of this world ever knew of the divine wisdom and secret plan of God as Scripture says : Eye has not seen, ear has not heard, nor has it dawned on the mind what God has prepared for those who love him (1 Corinthians 2:9). To understand this, one has to have the mind of Christ in spiritual maturity.
Growing into spiritual maturity is becoming less self-conscious.