No Light

But the matter is as follows. There is a general rule: “there is no light without a vessel”. That is to say, it is impossible for there to be a filling without a lack. Therefore, when a person gives a toil, and invests strengths and efforts in order to arrive at the state where he is bestowing to the Creator, and the more that he invests powers, there is awakened in him more lack for the filling, that is to say, according to the degree in which he toils to reach a level of bestowing, he sees that he is far from it. And who makes him understand that he is far from being bestowing? It is the work itself.

 

Rabash

What are the powers which are needed for work