Then the blind man said, “I can walk, but I cannot see it.” The other said, “Come and carry me.” So the blind man carried the man unable to walk, who kept telling him, “Come this way; come this way.” The man unable to walk gave instructions to the blind man, and he followed them. Who, then, should be punished?’ He replied, ‘Both of them.’ The angel said, ‘Such is your situation.’” Or words to that effect.

This is directly observable and agreed upon by all rational people. Those who call it the “rational soul” agree that it became attached to the body