one who claims who knows actually doesn't really know.
substantial contribution to a pool of water is not substance, just
like one sweep the water suface, images dispersed, nothing goes
in.
for ego-centered ones, any substance cannot penetrate into that ego
gates blocking the mind, thus always thinking one knows it all and
doesn't need or heed anyone else's contributions.
to experience reality, it is from within not by words or from
outside. if one is coward to enter the domain of oneself and
abstract the true reality, what brave is the one on the outside but
only a piece of rock without core.