Here's the thing

Meaning

This is used to introduce a crucial point or a clarification. It is a softened way of saying, You are wrong, or, You are missing a very important detail.

Reasonable, explanatory

Used in a sentence

• Here is the thing, we cannot simply drive to Alaska in one day.
• Here is the thing, the plant needs more sunlight if you want it to bloom.
• Here is the thing, I do not think he meant to be rude on purpose.