By his study of the Vedas all the pious acts are done. Whether he does or does not acquire anything else, if he only studies the Vedas, he becomes known as a Brahmana or the friend of all creatures.
परिनिष्ठितकार्यस्तु स्वाध्यायेनैव ब्राह्मणः। कुर्यादन्यन्न वा कुर्या-मैत्रो ब्राह्मण उच्यते॥