Apostle Peter admitted the difficulty in grasping some of the things written by Paul. Beyond what Peter said of Paul, an honest reader of the Bible will readily admit that there are tough issues to decode. Take for instance the doctrine of Trinity. Adherents of the Islamic religion will accept many of our claims about Jesus and Christianity. However, when you discuss the deity of Christ or the triune nature of the Godhead, you will stir up a controversy. Not even among professing and sincere Christians do you have a robust discussion and consensus on such subjects. Personally, an anonymous quote settled the doctrine of the Trinity for me. It says, “Deny the Trinity and you will lose your soul; try to explain it and you will lose your mind”.
The point is that we cannot by our rational mind know God. The Bible puts cap on this: “Can you search out the deep things of God? Can you find out the limits of the Almighty?” Job 11:7 NKJV. The answer is a no! Revelation is the key to knowing God. “All things have been delivered to Me by My Father, and no one knows the Son except the Father. Nor does anyone know the Father except the Son, and the one to whom the Son wills to reveal Him.” Matthew 11:27 NKJV. In our text, Paul admitted that it was when it pleased God that He revealed His Son in him. Those who desire to know God beyond mental assent should rely on the spirit of revelation.