New-fangled digital devices help detect an out-of-tune note and perfect it. Most of these have some sort of readout that appears as a needle wavering too much to the left, or flat side, or too much to the right, or sharp side as an instrument is tuned, with the goal of getting the needle dead center of the two, making the note "in tune." This reminds me of an anology that could be made in the spiritual world between two extremes of error that can fall somewhere on the flat side of the sharp side, with truth being dead center.