Some cases are effective because of a constant.

But in many other cases, a case may only be effective when it is  

This distinction between active and passive processes often
defines the origin of a function.

The origin of any function is in the active case.

For example, someone with 'active' biological functions in the
mouth, such as a special natural acid that spurts to prevent
elongated teeth, is closer to the origin of the authentic mouth.

Likewise, philosophy that is merely academic is less active than
the original philosophy of the early Greek physiologoi (physical
logicians), because it is the original philosophy that is more
authentic for the philosophical process.

These cases seem like magic by comparison to the passive cases,
and yet they are cases that do exist. In fact, these cases define
the majority of actual functions within the body, and may differ
markedly from passive-functioning variations.