An uncomfortable or unpleasant fact, especially one that is hard to hear or acknowledge. Often used in the plural. After growing tired of Paul's constant complaining, Jana decided to tell him a few home truths about his bad attitude.
A key or basic truth, especially one that is discomforting to acknowledge. For example, It's time you told a few home truths here, such as where your campaign finances actually came from . This expression uses home in the sense of "the very heart of a matter." [c. 1700]