I have long ago come to the conclusion that keeping knowledge and taking it to your grave without passing it on is doing this world a disservice.
Reminded me of this passage from the article "Good Fellowship" by Charles Heyward:
"Among craftsmen, especially, a spirit of good fellowship makes all the difference. Modern conditions do not always make it easy. Wherever there is a feeling of insecurity a man may easily become distrustful of his fellows, guarding his knowledge with the feeling that it is the one thing he has to arm him against the world. But hoarded knowledge can never be as productive as knowledge which is shared. It is not the man who warns off enquirers with a mutter of “trade secrets” and a “please-keep-off-the-grass” expression who will keep abreast of the times, but the man who will readily exchange experiences, discuss, and, when need be, give guidance to others. It is remarkable, when one comes to think of it, the number of ideas which are generated in conversation. A tradesman can easily, in answering the questions of the novice, be brought to consider for the first time the whys and wherefores of using certain processes. Such was the trade custom, but why? Or, swopping experiences with another old hand, he gets to know of other methods as sound, maybe sounder, than his own. But he has to give as well as take. There has to be fellowship, even in the generation of ideas."