We exist to know God and to make God known

Eph. 4:11-16 "And He Himself gave some as apostles, and some as prophets, and some as evangelists, and some as pastors and teachers, for the equipping of the saints for the work of service, to the building up of the body of Christ, until we all attain to the unity of the faith, and of the full knowledge of the Son of God, to a mature man, to the measure of the stature which belongs to the fullness of Christ, so that we are no longer to be children, tossed here and there by waves and carried about by every wind of doctrine, by the trickery of men, by craftiness in deceitful scheming, but speaking the truth in love, we are to grow up in all aspects into Him who is the head, that is Christ, from whom the whole body, being joined and held together by what every joint supplies, according to the properly measured working of each individual part, causes the growth of the body for the building up of itself in love." (LSB)