non-duality...
my take on it is... in the most basic sense...
we impose upon the world and the people around us with "angles": good/bad, black/white, etc, and yet- the world isn't always like that...
"...clinging not to extremes..." is how a person reaches the furthest shore... if you have such firm beliefs, such a firm sense of what right and wrong is, then you will suffer... clinging to silly notions, such as the supremacy of a specific football team to the extent you meet up and fight opposing teams with bottles and boots... silly... extremism comes from this grasping onto things, hatred comes, so too greed, anger, malice, all these poisons, and afflictions come... so, good/bad, etc; bear in mind all is relative, bear in mind there are many facets, and aspects, to any given opinion, character, situation, and you will never be a fascist...
or so I have heard...
and yet- in another sense, non-duality is more complicated... for me, it's a twofold dislike- I think that this focus on non-duality is perhaps a remnant of buddhism's more vedantic roots and secondly I think it causes division between buddhists...
initially, this dualism was between Reality and Non-Reality; the asat and sat, this became personified in brahma and maya, and in buddhism the same notion becomes a more intellectual interpretation, more philosophical, but it's the same thing- deciding on the difference between what constitutes asat, the non being, and the sat, the being, or, as it's more usually described, illusion and non illusion. Ultimate truth and that which appears like truth, the Paramarthamsatya and the Samvrttisatyam, the buddhist division of the two truths...
you have probably come across the different buddhist schools and know that people such as mahaprasangikas differ from the cittamatrins due to their interpretation of this non-duality concept, although, of course, it's been overintellectualised to such as extent it's barely visible, there it is...!
some say there is something, some say all, some say nothing. Some divide. All cling to extremes.
for me, its more like... not good, not bad, just is... not "just is", -let's not bother making things better, or -let's stop making things worse, not -let's give up, simply accept the status quo, but.... just "is"... not something to pretend doesn't exist, or if we could become miraculously enlightened we might suddenly wake up in this unreal reality where nothing (something) exists...
good exists, just like bad does, and yet... good to know what good and bad is, then, up the good, squash the bad, all live happily ever after..
yet... all things are relative...
as you say, cav, "If you can meet with Triumph and Disaster
And treat those two impostors just the same"... then you have reached a level of awareness and maturity that most humans never reach, and hence, yes, you are then, a man...
there's just not that many men about! lol... adios...