Illustrate an ethereal watercolor scene depicting the four creatures from the Book of Revelation chapter four. They should be a soaring eagle, a majestic lion, a sturdy ox, and a human figure, each boosted by wings and adorned with eyes. The ambiance should be solemn and reverential, celebrating Christian faith. Keep in mind that no textual content or words should be present in the artwork while maintaining a deeply devotional tone. The style should honor traditional watercolor techniques prevalent in the ancient eras.