First type is like a blind man--have to depend on others to relay info to them(usually wrong info). The 2nd type is like a deaf person--when Guru says right they hear it as white. The 3rd type is like a dumb person--they know what is right and what is wrong but wont talk about it--their motto--to each his own poison. The 4th type is very rational and sensible--wont simply accept anything without deep investigation. Now which category do you belong to? Santhosham.