Because there have been times when we have prayed day and night and God has not seemed to be in any big hurry to do anything. Our problem dragged on. Our prayer wasn't answered the way we expected. Perhaps our perception of hurry is different from God's perception of hurry. The way we understand and experience time is a very culturally based thing, you know.
Different cultures experience time differently.
I said about an hour for worship. About 15 minutes for preaching. He just shook his head. He didn't understand it. He is used to services that go 2 and a half hours.