For many years, material scientists have tried to go to the moon, but they are still unable to go there. However, the spiritual airplanes from the spiritual planets can take one back home, back to Godhead, in a second. The speed of such a spiritual plane can only be imagined. Spirit is finer than the mind, and everyone has experience of how swiftly the mind travels from one place to another. Therefore one can imagine the swiftness of the spiritual form by comparing it to the speed of the mind. In less than even a moment, a perfect devotee can return home, back to Godhead, immediately after giving up his material body.