In the modern era we keep looking for scientific explanations for everything that we do, and Vedas are one of the oldest sources of logical, scientific facts. Vedic pujas form a rite of passage for the spirit of the deceased from one life to the next with fulfilment.
After the death occurs, the spirit of the deceased stays around the people the deceased was close to for 12 days. Bhagwad Gita and Garudpuran are two of the most important scriptures that talk about life and death. Reading them aloud helps the spirit detach from the earthly attachments and attain liberation. Both these scriptures are read to send off the spirit peacefully to heaven. It is believed that on 13th day (Teravih) the spirit is given the final send off and it detaches from its family. Reading these scriptures also help the mourners come to terms with the loss of a loved one.