"Bias" here and on OB generally refers to systematic errors in our truth-seeking and decision-making processes. For instance, confirmation bias: we notice evidence in favour of our beliefs much more easily than evidence against.
those words are everything in the brain and represent everything outside of the brain [...] There are even more words than things since we have a word for no thing.
Lots of important things happen in the brain without words. (And, just in case that last sentence is meant to be anything more than a joke: there are obviously far more things than words, though it's not so clear whether or not there are more things than are adequately describable in words.)
my L[ove]&R[espect] was not and is not based on who you are, good or bad [...] the Love and R[espect] being unconditional, having no conditions nor limitations. Neat, eh?
I would certainly prefer to be loved on such terms than to be hated on such terms, but in general I value someone's love and/or respect more when it is based on who I am and what I am like. Consider a more specific kind of love: would you want to be married to someone who loves you exactly as much as s/he loves everyone else in the world, and whose love is entirely independent of who you are?
It is why kids say 'It takes one to know one just based on learning the alphabet, and without any adult teaching them to say so
I am skeptical; do you have any evidence that children spontaneously invent this idea themselves? I think the tradition of saying that is passed down from one child to another, and sometimes from parents to children (I don't believe that adults are completely consistent in not liking it) and the reason is not that there's any truth in it but that it's a good-sounding retort. If you're right then the idea should probably be found roughly equally in all cultures; if I'm right then it should probably be much less common in some cultures. I wonder which of these is so.
I understand why you feel that way
Perhaps you do, but I don't think you have enough information to know that you do.
it covers all words and their opposites and so includes all those who I have NOT interacted with nor yet imagined.
It seems to me that there is a difference between having the (single, vague, abstract) thought "for all X, I love myself as X" and the (multiple, more specific and concrete) thoughts for all X: "I love myself as X". And while I can imagine (though I remain to be convinced) that the latter might turn out to be helpful in the project of loving one's neighbours, the former seems less relevant; but the latter seems to be what you're actually talking about here.
The brain works by words, words work by their opposites
I do not believe you. Would you care to explain why I should?
(Unless you mean something as limited as "one thing the brain does is to use words, and sometimes words remind us of their opposites", which is true but doesn't seem to me to offer any support for your claims.)
what prejudices do you think WJ was referring to?
Any and all preconceived ideas, of which most of us have far more than we care to admit. You can find (what I take to be) a less condensed description of the same idea in an OB post from 2007.
To break up the awkward silence at the start of a recent Overcoming Bias meetup, I asked everyone present to tell their rationalist origin story - a key event or fact that played a role in their first beginning to aspire to rationality. This worked surprisingly well (and I would recommend it for future meetups).
I think I've already told enough of my own origin story on Overcoming Bias: how I was digging in my parents' yard as a kid and found a tarnished silver amulet inscribed with Bayes's Theorem, and how I wore it to bed that night and dreamed of a woman in white, holding an ancient leather-bound book called Judgment Under Uncertainty: Heuristics and Biases (eds. D. Kahneman, P. Slovic, and A. Tversky, 1982)... but there's no need to go into that again.
So, seriously... how did you originally go down that road?
Added: For some odd reason, many of the commenters here seem to have had a single experience in common - namely, at some point, encountering Overcoming Bias... But I'm especially interested in what it takes to get the transition started - crossing the first divide. This would be very valuable knowledge if it can be generalized. If that did happen at OB, please try to specify what was the crucial "Aha!" insight (down to the specific post if possible).