The Blessed Buddha once noted:
There are these three kinds of bodily sick people:
One will recover by himself, even without any doctor or any medicine..
One will never recover, even if treated by the best doctor & best medicine..
One will only recover if treated by right medicine and a good doctors advice..
It is for the sake of this last person, that doctors work and medicine is made!
Similarly with those mentally infected by illness of greed, hate & ignorance!
There are these three kinds of mentally sick people:
One will cure & free himself, even without meeting this Buddha-Dhamma...
One will never be cured, even if taught this Dhamma by the Buddha himself...
One will be cured & freed, if & only if, taught & learning this Buddha-Dhamma...
It is for the sake of this last type of person, that this Dhamma should be shared!