In Greek mythology, the Moirai, also known as the Fates, play a crucial role in determining human destiny. They are depicted as three sisters: Clotho, who spins the thread of life; Lachesis, who measures it; and Atropos, who cuts it, signifying death. Together, they symbolize the unalterable fate that governs human existence, emphasizing the inevitability of destiny. Their influence showcases the tension between free will and predestined outcomes in human life.