Every time a new baby is born, all the friends and relatives insist that the baby looks most like his father — or his mother — or Uncle Harry or Grandma Bess. However, the fact is that, although infants may bear some resemblance to a particular relative, babies change as they grow. One of our children was born looking like his daddy and ended up looking more like his maternal grandfather. In other instances, the resemblance might not be physical, yet may be clearly evident in behavioral patterns or personality characteristics.
Family resemblances give us a clue to a spiritual truth: Just as we tend to look like our human parents, Daddy God designed us spiritually to reflect Him in this world. When people look at us, He wants people to see Him. That means I should walk like Him, talk like Him, forgive like Him, love like Him. Of course, the transformation process of bearing His image is a lifelong one! The good news is that, since I am powerless to change myself, the Holy Spirit Himself does the work. The only requirement is that I be willing and available!
Paul explains the looking-like-Daddy-God process in 2 Corinthians 3: 18 (AMPC):