Full Idea
The gods bound the mortal soul within the chest - the thorax, as it is called.
Gist of Idea
The gods placed the mortal soul in the chest
Source
Plato (Timaeus [c.362 BCE], 69e)
A Reaction
Timaeus recognises the importance of the head, and the fact that the main senses pass into the brain, but they had no indication of where thought and reason occur.
Book Reference
Plato: 'Timaeus and Critias', ed/tr. Waterfield,Robin [OUP 2008], p.69