'He who knows doesn't talk'

I've recently received some news from a Canadian physician who e-mailed me over a year ago asking for help in finding an authentic Tai Chi/Chi Kung master who can give him 'qi transmission'. One year on he's now informed me that he'd just discovered that he had been tricked by a Malaysian 'master' with whom he's been studying for over a year.
At such a result I am not surprised at all. If you go around seeking something with money, you're guaranteed to get responses from tricksters who promise to give you what you want in exchange for money. Those who cry their wares the loudest are often the ones who have the shoddiest trash to sell. They like making all manners of claims to lure people into buying whatever they've got on offer. On the contrary, true masters seldom call themselves 'masters'; they never shout about their talents or powers and instead guard these with caution and care. They know that what they've got is priceless because it's been handed down within the lineage through the grace of his predecessors and his powers have been obtained after years and years of pain-staking practice on his own part. Such a master is only willing to impart his insight and knowledge to those he considered worthy and fit to carry on the tradition, not to anyone who is happy to offer money in exchange for some 'tricks' or 'secretes'. These masters might not have chosen not to talk; but they find it hard or even impossible to talk about what they experience deep within. What they can find words to give expressions are often the side-effects or even the dross not the essence. Take this rather mysterious 'qi' for example. Those who've developed qi to a high level often find it hard to describe what it is like simply because there are no accurate words for it. It's similar to trying to describe to the sightless the grandeur of the sea or to the deaf the joys of listening to music.
The worst type are those who've been to a few workshops from some self-styled 'masters' and than start bragging about what they've picked up in a 'Chinese whisper' and 'spoon-fed' fashion. Their motives for doing so is either name and fame or money. These two in a materialistic and commercial world is exchangeable because name and fame brings money.
On the other hand, only those students who follow their master's instruction in their practice with diligence and perseverance can hope to understand what their master is trying to teach through their own experiences. Only they can communicate with their master on the same wave length. They apply all their effort in deepening their practice day after day seeking proof and evidence from within themselves in accordance with their master's teachings. When do they get time to go around telling others about it. What they can feel and experience from within won't make much sense to outsiders anyway if they tried to tell about it. 
Lao Tzu once said that 'the less people knows about me, the more valueless I become'.

He who knows doesn't talk.

He who talks doesn't know.

Close your mouth,

block off your senses,

blunt your sharpness,

untie your knots,

soften your glare,

settle your dust.

This is the primal identity.

Be like the Tao.

It can't be approached or withdrawn from,

benefited or harmed,

honoured or brought into disgrace.

and for that reason is the most priceless under heaven.

--- Lao Tzu, Tao Te Ching