You see yourself by looking at your own children. It is also true that by looking at your parents, someone can see what kind of a child you are. Because of love you feel one with your parents. But if it is hatred you feel towards them, you will also hate that which resembles you, whether it is your parents, children or whatever. We take after our grandparents too.
Love is the bond.
Without love there is only chaos and hatred. That is what we see here on earth. It is not outside. I create heaven or destroy it. I make a happy life or create misery.