cut to the pith (of something)
To focus directly on the essential or core matter(s) of a given topic or issue. Her newest book cuts to the pith of what it means to be human. We are looking for a reporter who will cut to the pith, not fluff their articles with unnecessary details or asides.
pith of the matter
The core, central, essential, or most important part(s) or element(s) of some matter at hand. I'd love to sit and catch up with you, John, but let's get to the right to pith of the matter and start talking business. Your Honor and the jury will find that the pith of the matter is revealed by this single piece of evidence—the murder weapon, with the suspect's finger prints all over it.
great pith and moment
High importance. A: "Making a speech at your college graduation is an occasion of great pith and moment." B: "I know, and I'm so honored that the committee chose me." Getting engaged is a decision of great pith and moment—do not take it lightly.