He gets Concepts, as opposed to the Recepts of the animals.

With this goes the development of speech, which some psychologists consider the source of all the man's superiority over the animals.

Words become symbols of a highly abstract sort for certain classes of experiences; and, moreover, through speech a means of social communication is afforded by which the development of the individual is enormously advanced.
It is probable, in fact, that this difference--that between the Generalization which uses symbols, and mere Association--is the root of all the differences that follow later on, and give man the magnificent advantage over the animals which he has.

From it is developed the faculty of thinking, reasoning, etc., in which man stands practically alone.

On the brain side, it requires special developments both through the preparation of certain brain centres given over to the speech function, and also through the greater organization of the gray matter of the cerebral cortex, to which we revert again in a later chapter.