Periodicity Quotes

If life is not always poetical, it is at least metrical. Periodicity rules over the mental experience of man, according to the path of the orbit of his thoughts. Distances are not gauged, ellipses not measured, velocities not ascertained, times not known. Nevertheless, the recurrence is sure. What the mind suffered last week, or last year, it does not suffer now; but it will suffer again next week or next year.

If all the elements are arranged in the order of their atomic weights, a periodic repetition of properties is obtained. This is expressed by the law of periodicity.

The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.

The modesty of women, which, in its most primitive form among animals, is based on sexual periodicity, is, with that periodicity, an essential condition of courtship.

In nature nothing is at standstill, everything pulsates, appears and disappears. Heart, breath, digestion, sleep and waking - birth and death - everything comes and goes in waves. Rhythm, periodicity, harmonious alternation of extremes is the rule. No use rebelling against the very pattern of life.

This priesthood became a closed group, able to control enormous wealth and incomes, and concerned very largely with the study of the solar and astronomical periodicities on which there influence was originally based. With the surplus thus created, the priesthood was able to command human labor in huge amounts and to direct this labor from the simple tillage of the peasant peoples to the diversified and specialized activities that constitute civilized living.

Childhood is a complex dialectical process characterized by periodicity, unevenness in the development of different functions, metamorphosis or qualitative transformation of one form into another, intertwining of external and internal factors, and adaptive processes which overcome impediments that the child encounters.