Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 1
The habit of criticism – mostly ignorant criticism of others – mixed with all sorts of imaginations, inferences, exaggerations, false interpretations, even gross inventions is one of the universal 
illnesses of the Asram. It is a disease of the vital aided by the physical mind which makes itself an instrument of the pleasure taken in this barren and harmful pursuit of the vital. Control of the speech, refusal of this disease and the itch of the vital is very necessary if inner experience has to have any true effect of transformation in the outer life.