Examples:

• This is the crux of the matter, in my opinion.
• Tahani, I'll get right to the crux of the matter.
• The crux of the matter is that we must respect nature.
• And that is the crux of the matter.
• And that was the crux of the matter.
• This is the crux of the matter and nothing else.
• That diverts attention from the crux of the matter.
• The last inch being the crux of the matter.
• The crux of the matter is, I want to become President.
• The crux of the matter is the economy.