According to Plato, the brain is the biological seat of dreams. This is because the brain is responsible for all mental activity, including dreaming.
Plato suggested that dreams are not a supernatural phenomenon but a natural one. He believed that they were caused by an excess of blood in the head, which led to drowsiness and sleepiness. When this happened, images were created in the mind which were then recalled upon waking up.
The brain is like a computer that stores information and processes it. When we sleep, our brains do not completely shut down like they do when we are awake. Instead, they continue to process and store information while we dream. This explains why people often remember their dreams after waking up.
Plato’s theory was based on observation and experimentation rather than pure theorizing about what might cause dreams. For example, he noted that when people drank too much wine before going to bed they experienced strange and often unpleasant dreams; whereas if they ate spicy foods before going to sleep, they would dream about beautiful women or men depending on their sex.
This led Plato to conclude that food eaten before going to sleep affected what we dream about because it affected how our bodies worked while we slept.
