A singular element of truth or wisdom within a greater story, narrative, speech, or claim, especially when most or all other elements are fictitious or of questionable veracity. I think the governor's speech is a bunch of hogwash by and large, but there is a kernel of truth in what he said about the need for lower taxes.

If you want something desirable or appealing, you must put forth the effort required to obtain it. I know it sounds scary to start your own business, but that's the only way you'll get to be your own boss. He that would eat the kernel must crack the nut and all that.