"Beautiful Boy (Darling Boy)" is a song written and performed by John Lennon
for Lennon's son, Sean, his only child with Yoko Ono. It begins with John comforting his son from what is presumably a nightmare and develops into John passionately describing the love he has for his son and the joy Sean gave him.
At the end of the song, John Lennon whispers, "Good night, Sean. See you in the morning. Bright and early."
The lyrics of "Beautiful Boy (Darling Boy)" contain the famous Lennon quote "Life is what happens to you while you're busy making other plans."