Active love is a force.

The most beautiful human emotion is love; the behaviour in life which that emotion prompts is benevolence, kindness to others, sympathy, and all the varieties of that characteristic. 

When the love principle is missing from nature, the result may be callous indifference to suffering in others, sometimes leading to acts of positive cruelty. 

Then, just as active love is a force, leading to blissful conditions of astral existence, active cruelty leads to a glimpse of or a more protracted sojourn on the terrible second sub-level. 

―A. P. Sinnett