Colossians 1:7

You learned it from Epaphras, our dear fellow servant, who is a faithful minister of Christ on our behalf,

(v7, NIV)

In this letter we are introduced to Epaphras. Those who this letter was addressed to should already know who Epaphras was. Epaphras was the one who told them and taught them about the good news of Jesus Christ. Even though he was the one who taught them, he is referred to as a fellow servant. It's not like he is higher or better them in any way. He is not of higher rank than them, but he is on the same level. Sure, we're all different and some of us are better than one another in different ways. For example, I'm not the smartest guy and many people are a lot smarter than me. However, we should remember that we are fellow servants and we shouldn't pride ourselves in comparing to one another. In other letters, Paul talks about it as being partners in the gospel or as co-heirs in the inheritance. We are fellow servants.