कारणा-भावात कार्याभावः| न तु कार्यभावात कारणा-भावः||
Cause > Event> Effect
There is no effect possible without a cause.But the absence of effect
does not mean the absence of cause.
The text also substantiates the above fact with an example : Applying a force (less than needed to overcome friction) will not make a body move.In this case ,the cause (the force) is present but
not the effect(motion).