Yoga Is a Science Pt2
Take the breeder of pigeons. Out of the blue rock pigeon he develops the pouter or the fan-tail; he chooses out, generation after generation, the forms that show most strongly the peculiarity that he wishes to develop. He mates such birds together, takes every favoring circumstance into consideration and selects again and again, and so on and on, till the peculiarity that he wants to establish has become a well-marked feature. Remove his controlling intelligence, leave the birds to themselves, and they revert to the ancestral type.
Or take the case of the gardener. Out of the wild rose of the hedge has been evolved every rose of the garden. Many-petalled roses are but the result of the scientific culture of the five-petalled rose of the hedgerow, the wild product of nature. A gardener who chooses the pollen from one plant and places it on the carpers of another is simply doing deliberately what is done every day by the bee and the fly. But he chooses his plants, and he chooses those that have the qualities he wants intensified, and from those again he chooses those that show the desired qualities still more clearly, until he has produced a flower so different from the original stock that only by tracing it back can you tell the stock whence it sprang.
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