“Sad but True” is a song by American heavy metal band Metallica. It was released in February 1993 as the fifth and final single from their eponymous fifth album, Metallica. The music video from the single was released in October, 1992.
“Sad but True” is about blind faith in religion and the lengths people will go to to practice their faiths. The line, “I’m inside, open your eyes” means that god only exists in people’s heads. James Hetfield got the idea for this song from the 1978 Anthony Hopkins film Magic, which is about a ventriloquist who is controlled by his evil puppet.
Though the band had used “D standard” tuning for the recording and subsequent performances of covers such as “Crash Course in Brain Surgery” and “The Small Hours”, this was the second instance of the band using such a low guitar tuning for an original piece (“The Thing That Should Not Be” was the first, using drop D tuning in the studio, and tuning down to drop C# live). Bassist Jason Newsted tuned his 5-string bass down to “A standard” for this song, which is essentially the equivalent of D standard, i.e. one whole step down.