There exist three blind sisters, who live up among the clouds of Mount Olympus. The first sister unwinds the golden thread of the Gods. The second sister loops the thread through her loom, and weaves into the thread crimps and knots wherever she pleases. The third sister pulls the roughened-up thread as long as she likes and snips it with her gleaming golden scissors. Once cut the third sister tosses the thread out of the clouds of Olympus. The three cackle and converse while they repeat this process over and over again. And thus, what is a little hobby to the three blind sisters is the fate of every human life ever born.
The first sister represents the birth of a new human life. The second sister represents all the hills and valleys that will be there in an individual’s life, the quantity of which depends on her mood. The third sister represents the time of that human’s death. She can be swift and clean or slow and jagged in her cutting. That too depends on her mood.
So, when someone says leave your life to fate, they mean to put your life in these three sisters’ untrustworthy hands.