"Go Labour on, Spend and be Spent"

I have trouble connecting with/appreciating most hymns, but the following hymn fired me up. It was sent to me in connection with my previous blog post 'While it is Day'.

Go Labour on, Spend and be Spent
A hymn by Horatius Bonar (1808-1889)

Go labour on, spend and be spent
Your joy to do the Father's will:
It is the way the Master went,
Should not the servant tread it still.Go labour on, 'tis not for naught
Your earthly loss is heavenly gain;
Men heed you, love you, praise you not;
The Master praises: what are men ?.

Go labour on, your hands are weak
Your knees are faint, your soul cast down,
Yet falter not, the prize you seek
Is near -- a kingdom and a crown.

Go labour on, while it is day,
The world's dark night is hastening on.
Speed, speed your work, cast sloth away,
It is not thus that souls are won.

Men die in darkness at your side,
Without a hope to cheer the tomb,
Take up the torch and wave it wide,
The torch that lights time's thickest gloom.

Toil on,faint not, keep watch and pray,
Be wise the erring soul to win,
Go forth into the world's highway,
Compel the wanderer to come in.

Toil on, and in your toil rejoice,
For toil comes rest, for exile home;
Soon shall you hear the Bridegroom's voice,
The midnight peal, "Behold I come."