In addition to what we have already considered, it is important for us to notice carefully one other thing that Paul says to people who are having interpersonal problems. Verse 3 indicates that there may be times when a person needs the help of other Christians to solve his problems. At times, Paul intimates we should turn to other Christians for assistance in settling our differences. Apparently Euodia and Syntyche had not sought help from anyone.
Paul’s words infer that to this point they had not sought nor received the necessary assistance which their situation required. Foolishly, they were trying to make a go of it on their own. Foolishly, I say, because the Bible frequently admonishes us to request and receive the counsel of others. Foolishly, because to do otherwise is disobedience to God and disastrous to us
Dr Wayne Mack
Biblical Help for Solving Interpersonal Conflicts
Journal of Pastoral Ministry 1.2