Here's how you know your daughter has an awesome best friend:
My girl and her friend were playing at the park. I just told my girl that it was time to come home. She dutifully came inside and opened the window to yell a parting farewell to her awesome best friend. Her awesome best friend yells back, "Never will I leave you; never will I forsake you! Hebrews 4:14. Or something like that I just made up the last part. I don't know where it is."
And then we spent the next minute or so discussing where we thought it might be. (It's Hebrews 13:5, she was close.)