moon follows during its entire length.

"It is by comparing their different aspects and by calculating the
duration of their transformations, that men have been able to divide time
as they do in all the countries of the world.

"The science of numbers is also born of comparison, which has been
established between the quantities that they represent.

"This is the art of calculating the differences existing between each
thing, by determining the relativeness of their respective proportions.

"Comparison acts on the mind automatically, as a rule.

"It is indispensable to the cultivation of common sense, for it furnishes
the means of judging with full knowledge of all the circumstances.

"Analysis is an operation, which consists of separating each detail from
the whole and of examining these details separately, without losing sight
of their relationship to the central element.

"Analysis of the same object, while being scrupulously exact, can,
however, differ materially in its application, according to the way that
the object is related to this or that group of circumstances.

"There are, however, immutable things.

"For example: the letters of the alphabet, the elementary sounds, the
colors etc., etc.