The moon represents my heart! Why take the moon as the heart?

The ancients often used the moon to pin their feelings, because they and people far away could see the moon in the sky, so it was said that the moon sent thousands of miles of acacia. For example, Li Bai's "Worrying about the country and the people and the bright moon" and Su Shi's "I wish people a long time and the bright moon is beautiful" are all ancient artistic expressions borrowed by modern people.