The secret lies there, open to the gaze of him who knows how to search, but, like all of nature's secrets, it can not be purchased with money. Birth is usually regarded as the beginning of life, and death as its end, but this is a mistaken view. Every draught of water swallowed, every particle of food eaten, helps to keep this process of change in constant operation. Nature will attend to the changes with little help on your part, but you are the architect and must furnish the material. Every one can be master of his own body and has it within his power to make whatsoever alterations he desires.
Mind does control matter and wisdom comes with years.