The word 'spirit' is vague but the older idea is more accurate than the modern assumption that geniuses are merely 'smart' above a certain threshold. In reality creative genius expresses itself through those who love truth to their core and who follow only their inner motivations. These qualities are sometimes abandoned which results in a fall and a loss of former abilities.

http://iqpersonalitygenius.blogspot.co.uk/2015/06/the-endoge...