Matthew 28: 18 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.”
What does ‘disciple’ mean? A study of the word translated into English as “disciple” yields some good information that will provide a base for studying what Jesus meant and how he applied the word. 
The word in Greek is transliterated mathetes (literally, the learning one) and is derived from the verb manthano which means “to learn”. It occurs about 264 times in the Gospels and Acts. It means ‘One who learns instruction from another‟ or a disciple is likened to an apprentice who learns from his master tradesman. He can also be likened to an imitator of his teacher.
Gleaning the information from the Greek words one finds that a disciple is a person that not only gains knowledge from the teacher but also acts upon it. 
So in essence, a disciple learns from the Teacher and then acts upon it. This is very important. It is written in Matthew 23 (Jesus speaking): 
8 “But you are not to be called ‘Rabbi,’ for you have one Teacher, and you are all brothers.
We must understand that a disciple follows and learns from the Teacher. The disciple never replaces the one true Teacher or takes the role of the teacher. Jesus remains our Teacher and our Lord. We must never assume the role of Teacher but remain a follower in the service of our King and His Kingdom.