Is no soul responsible for another soul?

No soul has a right, consciously—or unconsciously, to lay burdens on any other.

It may be that this other is just struggling to lift its head out of the dark pool of ignorance, straining every nerve to drag its heavy body up into the light—it quivers with the strain of effort. 

At this point, a careless push, however light, may plunge it backward from whence it came, retarding its evolution for years, perhaps for ages.

We are brothers all and the soul's development is a result of what the strong do for the weak.