The prime idea

In the being of four there's a form taking place,
and on top of the body a master to face.
It is so that the head is the ruler of all
and that spring is behaving when forming the fall.

When the body is active, a baby is run
on the floor, thinking crawl is the utmost of fun
since by each entertaining and glorious round
there's a feeling anew of the way to be found!