The Bhagvad gita teaches that our activities have to be purified,and that purified activities are called

Bhagavad Gita Chapter 3 verses 9 and 16 explain that activities should be performed as yajña (sacrifice) for the satisfaction of the Supreme (Viṣṇu). Such purified, transcendental activities are called bhakti, devotional service. This contrasts with activities performed in the modes of passion (rajo-guna) or ignorance (tamo-guna), which are considered impure.