Q: How can I know that the Mother is working in me? I believe that everything is done by the Mother, the good things and the bad, but X believes that very few things are done according to her will. How can I know what is divine and what is undivine?
Why should the Mother do bad things in you? It is Nature that acts for that, not the will of the Mother. You can at least know that anger, jealousy, envy, restlessness, despair, indolence etc. are not divine things and that purity, peace, harmony, zeal, unselfishness etc., are good things and help the growth to the Divine.
Ref: The Mother with Letters on The Mother