In the context of Greek mythology, the concept of destiny often revolves around the idea of fate, which is controlled by the Moirae or Fates. These three sisters—Clotho, Lachesis, and Atropos—determine the lifespan and life events of mortals and gods alike, weaving their destinies. Greek heroes often struggle against their predetermined fates, illustrating the tension between free will and destiny, as their choices can sometimes lead to tragic outcomes despite the predetermined threads of their lives.