Each person is constantly interpreting their world through a grid, through a specific lens.  Kevin DeYoung contrasts viewing life through the lens of fairness contra the glasses of grace.  Taking us to the Parable of the Vineyard Laborers in Matthew 20, Kevin takes the three questions at the end of Jesus' famous parable to help expose how often the pastor's heart can give into viewing life through the lens of fairness rather than the glasses of grace.