And concerning you, my brethren, I myself also am convinced that you yourselves are full of goodness, filled with all knowledge and able also to admonish one another. Romans 15:14 (emphasis mine)
Paul has already told us that he had never been to Rome (Romans 1:10; see also 15:32). So how can he be "convinced" that these Romans have the capacity to admonish one another? Don't you need a Ph.D in Hebraic Idioms in the Minor Prophets to be a help to others?
Not according to Paul. Everyone in the New Covenant - even the brand new believer - has something to offer everyone else. That should be a rebuke to us if it takes one of the "important" Christians to encourage us, and it should be a comfort if we feel we don't have enough to help anyone.