Answer:
The Greeks believed in a pantheon of 12 gods, the Olympian Gods. Each of these gods had a different characteristic, and was a deity that protected a human attribute or a different natural characteristic. Thus, for example, Aphrodite was the goddess of love, while Zeus was the creator father and god of thunder.
These gods had personifying characteristics, by which it was believed that they could interact with mortals, influencing and relating to their daily lives. Even one of the most famous Greek myths, that of Hercules, speaks of a sentimental relationship between Zeus and a mortal woman, from which the protagonist was born.