Luke 10: O My God, how can it be

O My God, how can it be!
The work I undertake.
In Thy saints to wait on Thee,
Their servant for Thy sake;
Work for Thy great praise design'd
Doth oft from Thee mine eye divert,
Dissipate my burden'd mind,
And quite dry up my heart.

Help me, Lord, to recollect
My scatter'd thoughts in prayer.
Thee in all things to respect.
And all Thy burdens bear:
I shall patiently endure,
In care unmoved, in labour still.
When my works are wrought in pure
Obedience to Thy will.