“From the bottom of my heart”

Jose Feliciano – Feliz Navidad Lyrics on LyricsMode
EXPLANATION
He just really wants to wish you a Merry Christmas. Like he really wants to. From like, the bottom of his heart. You just be like really flattered that he wants to wish you a Merry Christmas this much. It's probably all he wants in life, you know? To wish you a Merry Christmas.