Its was said that Sattvik ahara leads to chitta shuddhi eventually . In this connection Also it was stated that non vegetarian food etc though nutritious is bad as it affects the mind. In Bengal Fish is offered as prasad to Godess Durga and during Durga puja and even otherwise eating fish is considered good. In fact only the widows are barred from eating non vegetarian food. Similarly during Kali Puja Goat is sacrificed in kali temple and eaten as prasad later. So how is this explained and what is the meaning behind this?