It was autumn, and the tribals asked their new chief if the winter was going to be cold or mild.
But since he was a chief in a modern society, he had not much wisdom to predict what the weather was going to be unlike his wise ancestors. So to be on the safe side, he replied to his tribe that the winter was indeed going to be cold and that the members of the village should collect wood to be prepared.
But also being a practical leader, after several days he got an idea.
He went to the phone booth, called the National Weather Service and asked 'Is the coming winter going to be cold?'
'It looks like this winter is going to be quite cold indeed,' the weather man responded. So the chief went back to his people and told them to collect even more wood. A week later, he called the National Weather Service again.
'Is it going to be a very cold winter?'
'Yes,' the man at National Weather Service again replied, 'It's definitely going to be a very cold winter.'
The chief again went back to his people and ordered them to collect every scrap of wood they could find.
Two weeks later, he called the National Weather Service again.
'Are you absolutely sure that the winter is going to be very cold?'
'Absolutely,' the man replied, 'It's going to be one of the coldest winters ever.'
'How can you be so sure?' the chief asked.
The weatherman replied, 'The tribals are collecting wood like crazy!'
A lot of phenomena happens like this in real world as well, and the lesson in this story should teach us one simple thing: It is good to believe the trends, consult 'experts', but in the end.. there's no subsitute for the wise man sitting inside of you.