What is most noteworthy, both about Apollos' arrival in this passage and about the relationships among the apostles and early church, is the absence of jealousy and rivalry. The absence of these is explained by two main things: 1) Their fundamental commitment to the truth, born of humility; 2) Their willingness to give everything they have been given, including their lives, in service to Christ. Where these things are present, jealousy cannot be.