A philosophical point: I sometimes think that by the time one has learned all lessons in life, it is too late to apply them. You're nearly dead.
The way I heard it from my west Texas cowboy/rancher grandfather, you quite learning only when that first shovel of dirt hits you in the face. From he vantage point of 72 years experience I am grateful for everything I have learned over the years, but that only opens the door for more knowledge and most importantly, more understanding.