It’s a phrase you hear when people look at children or a baby and their parents. “She looks like her father,” or “he looks like his mother.” Children are the image bearers of their parents. It’s a trait that goes back to Adam and Eve.
Genesis 5:1 tells us, “When God created mankind, he made them in the likeness of God (NIV).” Then verse 3 tells us, “When Adam had lived 130 years, he had a son in his own likeness, in his own image; and he named him Seth.” Not only are we image bearers of our parents, but we are image bearers of God.
So also it is written, “The first man, Adam, became a living soul.” The last Adam became a life-giving spirit. However, the spiritual is not first, but the natural; then the spiritual. The first man is from the earth, earthy; the second man is from heaven. As is the earthy, so also are those who are earthy; and as is the heavenly, so also are those who are heavenly. Just as we have borne the image of the earthy, we will also bear the image of the heavenly. – 1 Corinthians 15:45-49
140 Character Christian 
When committing the Sermon on the Mount to memory, I was trying to figure out how to remember that the Golden Rule immediately followed the passage asking, “Which of you, if his son asks for bread, would give him a stone? …” (Reassuring us that our heavenly Father will give to His children what they ask of Him.) At first I didn’t see a connection.
Finally, it occurred to me that in loving our neighbors as ourselves, we are resembling God! So, following the Golden Rule is the “family resemblance” that proves we are His children, and He will treat us accordingly, giving us what we need – bread, not a stone.