Survival is the biggest teacher.
But surviving how designs the lessons.
Insects survive , animals survive, birds survive, all do. But humans survive with the best strategies. Among humans few build strategies to become famous, few rich and few intelligent, few a combination of any two or all three or few. Few build strategies to yield nothing or few to trouble others or few more build strategies in the wrong directions with heights of ignorance and while away their time.
So amongst humans also there are few with irrelevant or good, or better or best strategies. So where should we stand is the decision to be made. And further the fuel for the strategies to take off – efforts, there is no escape to this.
So survival can be the best teacher when you accept to survive the best way not as a meagre.