Even the sacred holy Mother Ganges cannot avoid being polluted when she passes through cities and civilisations. So is the toxic environment we find ourselves in continuously polluting our mind. Recently due to lockdown, it was declared that the water of Ma Ganga in Haridwar is cleansed after ages and it is drinkable. So also, if we stop ingesting wrong food through our senses and stop polluting our mind, we will start feeling a deep sense of inner peace which is the nature of our Self within. 

Ingest nutrients and not pollutants.