Circular movements represent the shape of creation.  All arises from the void and returns again to silence.  All is vibration.  You arose from the mind of the Divine Mind, beginning as pure spirit and to Spirit you will return.  You experience what you know as birth and death, but these are merely re-cycling of the spirit into a form which can undergo experience.
 
Do you see the origin of this word “re-cycle”?  Look at nature, and there you will see countless cycles.  All is cyclical in a world without end.  This is why you can take comfort in the phrase, “This too shall pass.”  There will always be sunshine after the rain.  Yes, this means the rains will come again as well, but understanding the nature of cycles and your nature as a spirit-being, you can ride the wave in peace.