Once, he wanted more for himself
Good comments by Gary Hampton on Rev 1.1-3, among them, these:
This vision was delivered by heavenly messenger to John, who simply identifies himself as the Lord”s slave. Once, he had wanted more for himself (Mark 10:35-40), but now he had seen the Lord submit and serve others (Philippians 2:5-8; Matthew 20:20-28) and was following his lead.
I’m blessed to count Gary as a friend.