Tapa is not a sin, study is not a sin, the ordinances of the Vedas are not sins, the acquisition of wealth by exertion is not a sin: when they are abused, then do they become the sources of evil.
तपो न कल्कोऽध्ययनं न कल्क: स्वाभाविको वेदविधिर्नकल्कः। स्तान्येव भावोपहतानि कल्कः॥