28:20 teaching them to observe. Disciples are not just taught what to believe, but how to obey. Jesus taught practical holiness.
I am with you always. Jesus was named Immanuel (“God with us”) at His birth (1:23), and now He promises to be with His disciples to the end of the age. He is with them specifically in the responsibility of teaching His will to the world. See “The Mission of the Church in the World” at John 20:21.