Teaching them to observe all things that I have commanded you.
You cannot be a disciple apart from a life of obedience and a desire to follow Christ as Lord. One of the most important ways we obey is by teaching others to obey His commands.
Regarding the Holy Spirit, Jesus said, “He will teach you all things, and bring to your remembrance all things I said to you” (John 14:26). Through the Word of God, the Spirit has made that teaching available to every believer. And every believer is to submit himself to it in obedience.
Only a true convert will obey Christ. Only as you “present yourselves to God as being alive from the dead, and your members as instruments of righteousness to God” (Rom. 6:13) do you exhibit obedient faith.