Remember that mind and thought have their effect on the bodily health, no less than material and physical conditions; and that although a healthy body needs a sane mind, it is none the less true that a sane mind needs a healthy body; therefore maintain perfect equilibrium between the two. It may surprise you to hear your body compared to a bank; but the analogy is perfect, as I shall proceed to show. No living organism is precisely the same for sixty consecutive minutes. There are perpetually losses from within and gains from without; losses in the form of broken down tissue, gains in the form of food or air, which is the most essential form of food. So, in a bank, there is a constant interchange of deposits and withdrawals. No bank could exist if the depositors insisted upon their money being hoarded up there. It is the money, and not the bank, that is the fixed consideration, money being the medium of exchange. In the human system, food is the medium, and for the same reason that a bank cannot exist by hoarding up money, it is impossible for a living organism to exist by simply storing up food. There must be a continual interchange, otherwise the human bank cannot pay dividends in the form of health and energy. And even as some banks, that appear solid and substantial from the outside, may be on the verge of ruin, owing to the lack of supervision over income and expenditure; so many apparently robust bodies may be on the verge of physical collapse, owing to the mistaken belief that the body is simply a depository for food. Energy may be stored up in the system for future use, that being the dividend resulting from judicious interchange; but to force the system to receive more food than it can use and assimilate, is to invite disaster and pave the way to physical bankruptcy. A knowledge of banking is valuable in any walk of life, and I feel that the most valuable advice I can give my readers is to study Nature's bookkeeping, as manifested in the human bank, and to see that the balance is strictly drawn between income and expenditure. The world will yet see the day when it will be considered a disgrace to be sick; but in the meantime, humanity suffers for lack of that important knowledge--knowledge of self.