Coin collecting of investment, the principle of "caveat emptor" applies and study is recommended before buying. Likewise, as with most collectibles, a coin collection does not produce income until it is sold, and may even incur costs (for example, the cost of safe deposit box storage) in the interim. Coin hoarders may be similar to investors in the sense that they accumulate coins for potential long-term profit. However, unlike investors, they typically do not take into account aesthetic considerations; rather they gather whatever quantity of coins they can and hold them. This is most common with coins whose metal value exceeds their
Doctrine of the Mean described as the ["unswerving pivot" = Ezra Pound] 'unwobbling pivot' or "zhongyong". "Zhong" means bent neither one way or another, and "yong" represents unchanging. In James Legge's translation of the text, the goal of the mean is to maintain balance and harmony from directing the mind to a state of constant equilibrium. The person who follows the mean is on a path of duty and must never leave it. A superior person is cautious, a gentle teacher and shows no contempt for his or her inferiors. S/he always does what is natural according to her or his status in the