By the time a man realizes that his father was right, he has a son who thinks he’s wrong.
The root is Man realizes
Subject is man
Predicate is realizes
By the time is situating man
Realizes is the action that man is doing
His father is the object associated with man
Was right situates the realizes that the man went through
He is the subject of the second part which refers to man
Son is the object belonging to “he” which is equivalent to man
Thinks he’s wrong is the action that the son is committing which is used to further situate “He”
When the time comes that a man acknowledges that his dad was correct, he already has a son who believes he is incorrect.