We did not follow cleverly devised myths when we made known to you the power and coming of our Lord Jesus Christ, but we had been eyewitnesses of his majesty. For he received honor and glory from God the Father when that unique declaration came to him from the majestic glory, “This is my Son, my beloved, with whom I am well pleased.” We ourselves heard this voice come from heaven while we were with him on the holy mountain. Moreover, we possess the prophetic message that is altogether reliable. You will do well to be attentive to it, as to a lamp shining in a dark place, until day dawns and the morning star rises in your hearts. (2 Pt 1:16-19)
https://bible.usccb.org/bible/readings/080622.cfm
The morning star rises in your hearts . . . what a powerful image of the Risen Lord used also in the Easter Exultet! Unfortunately, today is also the anniversary of the atomic bombing of Hiroshima, Japan, in 1945, which killed about 150,000 people.