1. To understand the general law which controls the movements of the organs;
  2. To apply this general law to the movements of each particular organ;
  3. To understand the meaning of the form of each of these movements;
  4. To adapt this meaning to each of the different states of the soul.

The fundamental law, whose stamp every one of these organs bears, must be kept carefully in mind. Here is the formula:

The sensitive, mental and moral state of man are rendered by the eccentric, concentric or normal form of the organism.[1]

Such is the first and greatest law. There is a second law, which proceeds from the first and is similar to it:

Each form of the organism becomes triple by borrowing the form of the two others.

It is in the application of these two laws that the entire practice of the art of oratory consists. Here, then, is a science, for we possess a criterion with which all phenomena must agree, and which none can gainsay. This criterion, composed of our double formula, we represent in a chart, whose explanation must be carefully studied.

The three primitive forms or genera which affect the organs are represented by the three transverse lines.

[Illustration]

The subdivision of the three genera into nine species is noted in the three perpendicular columns.

Under the title Genus we shall use the Roman numerals I, III, II.