Go, labor 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, labor on while it is day: 

The world's dark night is hast'ning on. 

Speed, speed your work, cast sloth away; 

It is not thus that souls are won. 

Toil on, faint not, keep watch and pray; 

Be wise the erring soul to win; 

Go forth into the world's highway, 

Compel the wand'rer 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."

-Horatius Bonar (1808-1889), via BA Purtle