Answer:
Step-by-step explanation:
The description "learned the simple facts in life and lived by them" conveys that the author's father knows what is important in life. This statement suggests that the father has a clear understanding of what is truly valuable and has made choices based on these values. The use of the word "simple" also implies that the father has a straightforward and uncomplicated view of the world. So, the answer is "His father knows what is important in life."