Down through the centuries, Matthew 28:19 has come to be known as The Great Commission. Jesus came to His disciples and spoke these final words to them in person before ascending to heaven:
Therefore go and make disciples of all nations, baptizing them in the name of the Father and the Son and the Holy Spirit, (NET)
Effective Bible study always begins with good observation. Take note of the punctuation at the end of the verse. That's a comma. There's more:
teaching them to obey everything I have commanded you. And remember, I am with you always, to the end of the age. (Matthew 28:20 NET, emphasis added)
In verse 19, Jesus gave us the assignment, but He didn't leave it there. He assured us of His continual presence as we obey His command and, just as importantly, he told us how to do it. How are we to make disciples? By baptizing them and teaching them to obey.
Taken from "So, You Want to Be a Disciple-maker?" by Insight for Living Ministries (used by permission).