Discarding it mentally in the beginning, one should next discard it in word and thought. He who according to this rule, abstains from eating meat is said to be purified in a three fold way.
पूर्वं तु मनसा त्यक्त्वा तथा वाचाऽथ कर्मणा। न भक्षयति सो मांसं त्रिविधं स विमुच्यते॥