3 Key passages that summarize Jesus' purpose for the church:

The Great Confession:

Philippians 2:9-11

“…God Highly exalted Him, and bestowed on Him the name which is above every name, so that at the name of Jesus every knee will bow, of those who are in heaven and on earth and under the earth, and that every tongue will confess that Jesus Christ is Lord, to the glory of God the Father.”

The Great Commandment:

Matthew 22:36-40 

Jesus said, Love the Lord your God with all your heart...soul...and mind. This is the first and greatest commandment, and the second is like it: Love your neighbor as yourself. All the Law and Prophets hang on these two commandments.”       

The Great Commission:

Matthew 28:19-20 

Jesus said, “Go and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit, and teaching them to obey everything I have commanded you.”