It teaches us to be humble and to have faith in God. Whether one is reading the Bible, Gita, Koran, or Torah, all of these contain numerous tributes to God's or creator's eternal power. In Hinduism, the Tuesday and Thursday, in Christianity, the Sunday, and in Islam and Judaism, the Friday, are held as sacred. On those days, the followers of each respective religion light lamps or candles and pray to their respective Gods. Each observe a different day of the week, but the ritual is the same.
Soul is energy and hence is never destroyed.
Behind each Hindu belief, one can discover a scientific truth. The same holds in other religions, even if it is not implicitly stated. Thousands of years ago, the pyramids were built in Egypt without ever having been influenced by Hinduism. However, unconnected to the Hindus, they too believed in an afterlife as seen in their rituals of elaborate burial. The Sun is the source of all energy.