The curator says, Steven Spielberg is interested in what she calls "the moral core" that can be seen in many of Rockwell's images.

VOA: standard.2010.08.09

And it is that conflict, as it were, between what we might call worldliness and innocence that is the core of Machiavelli's moral code.

可以说，正是那种冲突,那种我们可以称之为世俗理念与纯洁无知之间,的冲突，是马基雅维利道德准则的核心所在。

耶鲁公开课 - 政治哲学导论课程节选

Jun Do is an idealist and the book's moral core, but he also possesses an uncommon skill for turning the government's mythmaking to his favor.

WSJ: Book review: The Orphan Master's Son

Pro-Republican bloggers have attracted headlines and roused followers in a way never been previously achieved, by reasserting moral arguments at the core of Republican ideology.

FORBES: 2012: The First Digital Election

Is this true, or are adult stem cells and cord cells in fact viable alternatives that avoid the moral controversies that are at the core of the embryonic stem cell debate?

CNN: Future Summit stem cell forum