How did Gottfried Wilhelm Leibniz explain the relationship between the mind and the body?

Gottfried Wilhelm Leibniz explained the relationship between the mind and the body through his doctrine of preestablished harmony. Rejecting the idea of direct causal interaction between mental and physical substances, Leibniz proposed that mind and body are two distinct, perfectly correlated series of events.12

He likened this relationship to two clocks that are synchronized by a creator at the beginning of time. In this view, when a change occurs in the mind, a corresponding physical event follows, not because one caused the other, but because God established a harmony between all monads (the fundamental psychophysical entities) at the moment of creation. Consequently, mental events are neither causes nor effects of physical events; they are simply synchronized to appear as though they interact. This philosophical position is known as psychophysical parallelism.1234