The bonds that exist between the heart of Joseph and that of the Child Jesus are--since Jesus is God--of an even more amazing clarity and strength. No child has ever been so united to his father as Jesus is to Joseph; no father has ever been so united to his child as Joseph is to Jesus. Joseph loves Jesus' heart--a heart so burning with love, so humble, so poor and so gentle; he loves it with a divine love, which is "substantial" and eternal. He is wholly given to Jesus and loves Him with all his heart as a man and as a father, and with all his sensibility, for Joseph loves the sensibility of Jesus' heart, which is so close to Mary's heart.
--from The Mystery of Joseph by Fr. Marie-Dominique Philippe, O.P.