Every age has its peculiar properties. The child has different thoughts of his father at different ages:

5 years old: “My father knows everything.”

10 years old: “My father knows quite a lot.”

15 years old: “I know as much as my father does.”

20 years old: “To tell the truth, my father does not know anything.”

30 years old: “Nevertheless, my father knows something.”

40 years old: “It would be fine if I consulted my father.”

50 years old: “My father knows everything.”

60 years old: “If only my father were alive and I could consult him about this and that. I should have appreciated him properly when he was alive.”