The Vishnu Sahastranam Puja is considered as a source of happy and long life. People perform this puja to get rid of evil forces. This is a belief that Lord Vishnu incarnate time to time on earth, to destroy the evil spirits on the earth. The Lord Vishnu is the protector of universe and his wife Laxmi is goddess of wealth. As per Great Bhishma in Mahabharat, Vishnu Sahastranam is the best remedy for removal of all the Paapas on this earth.