Apparently, it was George Bernard Shaw who quipped, “youth is wasted on the young”. It is certainly true that life’s journey teaches us many things some of which could have been put to good use sooner, if only we had known. Those of us lucky enough to have had mentors have been fortunate to have benefited from the wisdom of age without being old. The concept I am referring to is compound returns. Albert Einstein described it as the eighth wonder of the world. He went on to say “he who understands it, earns it ... he who doesn't ... pays it. Compound interest is the most powerful force in the universe.” This column is based on an article that a mentor gave to me almost 30 years ago. That experience taught me that a single concept, delivered at a “teachable moment”, can change a life - if not yours, then someone else’s. For many people the barrier to learning and applying this knowledge is that it is mathematically based and not at all i...