Nishchaya vs Vyavhaar

For an effect to happen there has to be a cause. It turns out there could be many causes for an effect to happen. All these causes can be bucketed in two categories:

1. Nishchaya cause:
This cause definitely brings the effect, and makes a direct cause and effect relationship with the effect. If such kind of cause occurs, the effect must occur. And if the effect occured, it must be followed by such cause.

2. Vyavhaar cause:
This is cause of Nishchaya cause. For example: For Moksha to happen, one has to to do shudha bhaav- which is Nishchaya cause. And for Shudha bhaav to happen, one has to make efforts - This efforts are called Vyavhaar cause- which are cause to Nishchaya cause.

This cause does not make the direct cause and effect relation with the effect- However it makes an indirect relation with the effect. If such kind of cause occurs, the effect may occur. However if the effect occured, it must be followed by such a cause.

Examples of vyavhaar cause:Vows, Sanyama, tapa, tatva gyan etc