"Ahu" are stone platforms on which many moai sit. There are 313 known ahu and 125 of these carry moai. The biggest, Ahu Tongariki is 220 m (720 ft), and had the most (15) and tallest moai.
The most comprehensive formulation of therapeutic goals is the striving for wholeheartedness: to be without pretense, to be emotionally sincere, to be able to put the whole of oneself into one's feelings, one's work, one's beliefs.
It is to see the faults of others, but difficult to see once own faults. One shows the faults of others like chaff winnowed in the wind, but one conceals one's own faults as a cunning gambler conceals his dice.