For me, one of the greatest English language hymns that I have never sung (in a congregation) is Lift up your voice and sing.
It is a reflection on freedom in the context of slavery and oppression in America, and framed in the language of the Exodus. Although it could apply in many situations it has never resonated outside Black America and those who are its allies. It has been sung at the SuperBowl, and especially in the context of George Floyd's death - but certainly not at Wembley or Westminster Abbey This is why I have never got to sing it, having only once preached in a Black American church.
It deserves far better and although much of it is movingly written, the line I have chosen is in the last verse which applies the spiritual warning for the freedom ahead - a verse sometimes left out perhaps exactly because it is so spiritual:
[Keep us forever in the path, we pray . . .] Lest our hearts, drunk with the wine of the world, we forget Thee;