As part of a Time Fathers' Day series, Pete Wentz of Fall Out Boy penned a letter to his two kids, and it is the sweetest thing ever. 

Wentz writes with disarming honesty on the anticipation of being a new father, feeling deeply unprepared, and learning the ropes of parenthood. “Bronx: before you were born, I had literally never taken care of anything in my life. Whatever the word for the opposite of responsibility—that’s how I would accurately describe my life then. I felt as unprepared for you as the dinosaurs were for the meteor,” Wentz says. 

He also has some pieces of advice for his sons Bronx and Saint: “Let your kindness radiate and defend those who cannot defend themselves. Be yourself when it is not popular to be.” 

Read the full piece in all of its adorableness here