When the Israelites were about to accept the Torah, they stated נעשה ונשמע - We will do (then) we will hear. In other words, the Israelites knew what they had to do even before they heard what G-d told them to do.
I had heard and read that all* Jews were physically present at Mt. Sinai receiving the Torah - You, my kids, and me - everyone. So everyone agreed to follow this "Do before hearing" concept in life.
I think that this is an adage and behavior that was a Jewish fundamental. Jews act before they hear what they need to do.
For some reason, though, I can't pass this idea to my kids. I have to remind them to pick up their clothes, take out the garbage, etc. When I ask them why they didn't do it, they say that I never told them! Aren't they supposed to know what to do before they hear me tell them? What happened to this adage obedience that my kids can't do their chores on their own?