Final answer:
Rene Descartes believed that the man is identified through his mind, which is distinct from the body. The mind is the source of consciousness, thinking, and reasoning.
Step-by-step explanation:
Rene Descartes believed that the man is identified through his mind.
According to Descartes, the mind is distinct from the body and is a non-physical substance. He argued that the mind is the source of consciousness, thinking, and reasoning, which differentiate humans from other beings.
Descartes' famous statement, 'I think, therefore I am', reflects his belief that the mind is essential to human existence.