I cannot but notice how easy this whole encounter seems. Phillip listens to the Holy Spirit and takes a trip not knowing what he will encounter. The Spirit directs him to join the chariot. As he obeys, he hears the Eunuch reading the best Messianic text (Isaiah 53) in the Old Testament. The man asks a question that is a lay up. Phillip tells him about Jesus then baptizes him. No fear, no struggle -- just make the next divinely orchestrated move. I long to be that Spirit-led.
Clearly this text teaches the priority of baptism.