Christ came to teach human beings what God desires them to know. In the heavens above, in the earth, in the broad waters of the ocean, we see the handiwork of God. All created things testify to His power, His wisdom, His love. Yet not from the stars or the ocean or the cataract can we learn of the personality of God as it was revealed in Christ.
God saw that a clearer revelation than nature was needed to portray both His personality and His character. He sent His Son into the world to manifest, so far as could be endured by human sight, the nature and the attributes of the invisible God.