It is the same for a father and son, or a mother and daughter. When a father looks at his son with the eyes of signlessness, he sees that his son is also himself. He is the father, but he is also the son. When a father looks like that, he can see his body outside his body. When the child looks at his father and sees himself in his father, he sees his body outside his body. When looking at our children or grandchildren, we see ourselves, and we begin to see our body outside this body.