The letters in brackets are in the International Phonetic Alphabet. "[hu]" only refers to the sounds [h] (the sound the letter 'h' makes in English) and [u] (the sound "ooh"), therefore [hu] could refer to the word "who" or the word "hu."

[hu] Knows

[hu] knows, [hu] really knows
[hu] knows, [hu] really knows
[hu] I am and [hu] you are
[hu] I am and [hu] you are
[hu] I am and [hu] you are
[hu] I am and [hu] you are

well I can say I am me
and you can say you’re you
how quickly we forget now
that we are each other, too
yes I can say I am me
and you can say you’re you
how quickly it’s forgotten
that we are each other, too

well you can take the high road
and I can take the low
and we’ll both get to Scotland
or wherever it is that one goes
yes I can take the high road
and you can take the low
and we’ll both get to Ireland
or wherever it is that one goes

omphaloskepsis, solipsism
omphaloskepsis, solipsism
omphaloskepsis, solipsism
omphalo...

well if we lost our bodies
and if we lost our minds
maybe we’d come together
and everything would be fine
but we’ve been given bodies
and we’ve been given minds
and we must learn to work with them
and be loving and kind
I’m closing off the chatter
and in the stream I’m lying
o let me float effortlessly
on the current divine

hu allah, hu allah
hu allah, hu allah
hu allah, hu allah