Revelation 4:8 (New International Version)
8Each of the four living creatures had six wings and was covered with eyes all around, even under his wings. Day and night they never stop saying: "Holy, holy, holy is the Lord God Almighty, who was, and is, and is to come."
Vain repetitions?
No one else on the park and ride bus route knows what I'm doing for that 30 minutes. Most people sleep anyway.
With regard to Rev. 4:8, is that a prayer, or is that adoration? It is not a prayer, it is a statement of adoration and devotion. This is not a prayer.
I think we would both agree that prayer is a private thing. If you pray quietly, or 'in secret' you can do so on a crowded bus. Unless I am gravely mistaken, I take that verse to mean that we should not be braggarts, standing in public, announcing to the world about how pious we are.