This is soon embodied largely in two indications: the face and the voice.

But it is easy to see that this is a very meagre sense of personality; a moving machine which brought pain and alleviated suffering might serve as well.

So the child begins to learn, in addition, the fact that persons are in a measure individual in their treatment of him; that their individuality has elements of uncertainty or _irregularity_ about it.

This growing sense is very clear to one who watches an infant in its second half year.

Sometimes its mother gives it a biscuit, but sometimes she does not.