Okay. Allow me to explain.
But first, let's read 2 Timothy 2:2 together:
"And what you have heard from me in the presence of many witnesses entrust to faithful men who will be able to teach others also."
In this passage, Paul is writing to Timothy. Note the following things: Timothy heard straight from Paul--not from others, but he was with Paul. Timothy learned directly from this teacher. Paul's charge to our friend Tim here is to "entrust [this message] to faithful men," so that they, in turn, may teach others.
Here we see four generations of discipleship:
Paul à Timothy à Faithful people à Others
This is what we here at the CCO call the "3, 12, 70" model. Disciple to a few (3) and equip them so that they may disciple a few more (12) to teach others (70). And so on and so forth. I mean, if you really stop and think about it, you are reading this blog only because of the first twelve who took the Great Commission seriously and went out and made "disciples of all nations" (Mt. 28:19).
No, seriously. Think about that for one moment. What if they hadn't taken this charge? What if, instead, they dwindled away their time apathetically, thinking that their lives would speak the gospel? What if they bought completely into the whole, "Preach the gospel, and if necessary, use words" and nothing else? Yes, friends, our lives do need to reflect the Kingdom of God, but for Pete's sake: use your words.
Now, returning to my first statement: my job ought to be obsolete because I shouldn't have to sit in training for my career, listening to someone tell me to make disciples. I should have been doing this my whole life! The church should be doing this the whole time. We should make disciples regardless of job, location, temperament, vocation, or giftedness.
"Therefore go and make disciples of all nations, baptizing them in the name of the Father, the Son, and the Holy Spirit, and teaching them to obey all that I have commanded you. And surely, I am with you always, to the very end of the age."
Matthew 28:19-20, NIV