There is only one thing between us and God, and that is our sin. It is not our intellect that separates us from God. The barrier is sin, this barrier that has come in. That is the problem: God is there, and we are here. “Why do I not know him?” asks someone. Because of this barrier. The only way to have it removed is through the Lord Jesus Christ. He came in order to be my sin offering. “God was in Christ, reconciling the world unto himself . . . he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him” (2 Corinthians 5:19, 21). There it is—your sin has been laid upon him, it has been dealt with, it is cleared. Believe it, thank God for it, and you will know him as your Father. Christ “is made unto us wisdom, and righteousness, and sanctification, and redemption” (1 Corinthians 1:30). “Do you need wisdom?” says Paul in essence to the cultured Greeks. “If you do, go to Christ. He is the wisdom of God; all the necessary truth is in him.” He is the truth.
Martyn Lloyd-Jones, Let Not Your Heart Be Troubled