"Jesus Himself said, 'If you think you love God but hate your brother, you are a liar. The truth is not in you.' If that doesn't shake an unforgiving person to the core, I'm not sure what would." - Carter Conlon
The writer of this Psalm, whoever he may have been here, in the name of all the faithful, puts God in remembrance of his promise, that he would never suffer his house or kingdom to fail, but support and defend both.