It defines who I am 5

Most of the religions all started from there, the curiosity to who we really are. With extensive astronomical observations and some deep thinkings, this subject was concluded in the shape of religions. We human don't like to think we're here with no purpose, so give it one. We cannot live without knowing there's somewhere else out there after we die, so give it a place. In the end, every individule chooses what suits him best, and that becomes his religion. This religion defines who he is, his purpose, and his meaning of life. If one really can't live with the notion of being an unimportant existence in this universe, then religion serves the purpose just fine.