The hose pipe of experience and knowledge

I was told by an elderly gentleman, that

knowledge is the only thing which grows when its is shared.

I dont know how far its is true! What are your views??

When I say “knowledge and expereince” I mean not a knowledge which students have, or a Bschool MBA has who talks like a parrot.I mean knowledge by the way of understanding and experience which makes you trust and have faith in yourself. If you are never going to push your boundaries, you are probably never going to know or gain any real experience for sure.

Where do you find people who know, and who can turn on their hose pipe of experience and knowlege.