There's the delicate and reassuring sadness that's at the core of the acoustic soul of "Someone New," and then there's the feverish "Stick," where lust is a paralyzing agent amid synths that scrape and scrap as if trying to set the song aflame.
Now the tale of someone at the core of the Korean experience - a teacher, and not just any teacher but one who earns half a million dollars (£319,000) a year.
What purpose could this mask possibly bring, because we all know that at the core of most people are good person, not someone who is always grumpy and mean.
At the core of our judicial system is the assumption that someone who appears sane is culpable for his actions.
Someone tells me that he believes that the core of Mars is iron.
No wonder the 20th-century philosopher Maurice Merleau-Ponty described Montaigne as someone who put "a consciousness astonished at itself at the core of human existence".
The core of the book is about life inside the juvenile justice system, portrayed with the grit and depressing realism of someone who knows.
He told the audience: "I've come to know Saif as someone who looks to democracy, civil society and deep liberal values as the core of his inspiration".
"It is the core of the regime".
