There is a English proverb to convince people to wake up early in morning. In Japan there is a proverb that has the same meaning of the title proverb.
Why is to wake up early important? Why ancient people didn’t say it’s important to stay up late? I guess it’s the truth but it’s not only the truth. When I get to the core of it, to control own sleeping is the important for us. In my case, I try it everyday but it’s difficult because human body needs minimum sleeping time.