The sun. Used literally and figuratively for God's impartial goodness, apocalyptic signs, and the glory of the risen Christ.
Hēlios operates on multiple theological levels. In the Sermon on the Mount, God 'maketh his sun to rise on the evil and on the good' (Matthew 5:45) — common grace. In the Transfiguration, Jesus' face 'did shine as the sun' (Matthew 17:2) — divine glory. In Revelation, the sun darkens in judgment (6:12) and becomes unnecessary in the New Jerusalem (21:23). The sun that began creation will be surpassed by the Creator.