SharonA - almost certainly since Mister Shine was the revered elder-figure of the trolls, the despised and discriminated against in Pratchett's discworld.

Him who mountain crush him no
Him who sun him stop him no
Him who hammer him break him no
Him who fire him fear him no
Him who raise him head above him heart
Him diamond

Just shows how far Pratchett's research wanders.
Merry Christmas and a happy and peaceful new year to you and yours.
Banjo