Isaiah 6:1-8 - Isaiah's vision of the heavenly throne of God
Psalm 8 - what is man, that you are mindful of him?
Revelation 4:1-11 - St. John's vision of the heavenly throne of God
John 3:1-15 - Jesus discusses new birth with Nicodemus
Cover art: Icon of the Trinity, from Genesis 18:1-8 (“The Hospitality of Abraham”), Andrei Rublev, 1411 or 1425-27, tempera on wood; Tretyakov Gallery, Moscow