There is a very interesting story of this hymn over here.
Lyrics: Ensign Edwin Young
Music: Harry E. Storrs
I wonder have I done my best for Jesus,
Who died upon the cruel tree?
To think of His great sacrifice at Calvary!
I know my Lord expects the best from me.
How many are the lost that I have lifted?
How many are the chained I’ve helped to free?
I wonder, have I done my best for Jesus,
When He has done so much for me?
The hours that I have wasted are so many
The hours I’ve spent for Christ so few;
Because of all my lack of love for Jesus,
I wonder if His heart is breaking too.
I wonder have I cared enough for others,
Or have I let them die alone?
I might have helped a wand’rer to the Saviour,
The seed of precious Life I might have sown.
No longer will I stay within the valley
I’ll climb to mountain heights above;
The world is dying now for want of someone
To tell them of the Saviour’s matchless love.