A worker of Light is any person emanating from the love and positive energy. Simple is not it? So, as soon as you do negative reviews, experience anger or other emotions … you are no longer on the side of the Light.
The Shadow loves to put you in situations where you express negative. Be it by the words read on Facebook or elsewhere, on television, in newspapers or other media. So, make yourself responsible, if you are not yet able to be neutral with respect to certain situations, events, people, etc., abstain for the moment. Feed as much as you can on any form of positive food (reading, relationship, television, etc.).