The harmonics of heat, light, sound, electricity, magnetism and of atomic structure and arrangement run in scales of seven.

The Law of Sevens governs the days of the week, the phases of the moon and the menstrual periods of the woman.  Every observing physician is aware of its influence on feverish, nervous and psychic diseases.

The Law of Sevens dominates the life of individuals and of nations and of everything that lives and has periods of birth, growth, fruitage and decline.

Over two thousand years ago Pythagoras and Hippocrates distinctly recognized and proclaimed the Law of Crises in its bearing on the cure of chronic diseases.  They taught that alternating, well-defined periods of improvement and of crises were determined and governed by the law of periodicity and by the law of numbers (the Septimal Law).

The following quotations are taken from the Encyclopedia Britannica, Vol.  XV, p. 800: 

“But this artistic completeness was closely connected with ’the third cardinal virtue’ of Hippocratic medicine—­the clear recognition of disease as being equally with life a process governed by what we should now call natural laws, which could be known by observation and which indicated the spontaneous and normal direction of recovery, by following which alone could the physician succeed.

“Another Hippocratic doctrine, the influence of which is not even yet exhausted, is that of the healing power of Nature.  Not that Hippocrates taught, as he was afterwards reproached with teaching, that Nature is sufficient for the cure of diseases; for he held strongly the efficacy of art.  But he recognized, at least in acute diseases, a natural process which the humours went through—­being first of all crude, then passing through coction or digestion, and finally being expelled by resolution or crisis through one of the natural channels of the body.  The duty of the physician was to foresee these changes, ‘to assist or not to hinder them,’ so that ’the sick man might conquer the disease with the help of the physician.’  The times at which crises were to be expected were naturally looked for with anxiety; and it was a cardinal point in the Hippocratic system to foretell them with precision.  Hippocrates, influenced as is thought by the Pythagorean doctrine of numbers, taught that they were to be expected on days fixed by certain numerical rules, in some cases on odd, in others on even numbers—­the celebrated doctrine of ‘critical days.’  It follows from what has been said that prognosis, or the art of foretelling the course and event of the disease, was a strong point with the Hippocratic physicians.  In this perhaps they have never been excelled.  Diagnosis, or recognition of the disease, must have been necessarily imperfect, when no scientific nosology, or system of disease* existed, and the knowledge of anatomy was quite inadequate to allow of a precise determination of the seat of disease; but symptoms were no doubt observed and interpreted skilfully.  The pulse is not spoken of in any of the works now attributed to Hippocrates himself, though it is mentioned in other works of the collection.”