What important lessons does Bill learn from his father in the novel, Farmer in the Sky?

Bill often asks his father's advice when caught in a difficult or challenging situation. Wise and intelligent, George Lerner obviously cares for his son but refuses to insulate Bill from the harshness of the real world. He prides himself on his ability to teach Bill the lessons of life by setting an example through his own deeds and decisions. Whenever Bill's crises have passed, he routinely sums up the lessons he has learned in words from his father's experience. George is a stable presence in the book, who provides a standard against which Bill measures his own growing maturity.