"with Christ's teachings" Matthew 28:18-20 - Then Jesus came to them and said, "All authority in heaven and on earth has been given to me. 19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age.
John 15:14 - You are my friends if you do what I command.
Revelation 2:10b - Be faithful, even to the point of death, and I will give you the crown of life.