Everything, every detail from the atom, the smallest unit of matter, to the galaxies harboring billions of stars; from the moon, an inseparable adjunct of the world, to the solar system; all work in a perfect harmony. This well-organized system runs flawlessly, just like a watch. People are so confident that this billions-of-years-old system will go on functioning - without leaving out even the smallest detail - that they can freely make plans about something they think will be realized in the next 10 years.