A Charge to Keep I Have

charge: an amount of electricity; 

the responsibility of managing or watching over something; the amount of an explosive material (such as dynamite) that is used in a single blast; 

an obligation or requirement; 

an expense or cost; 

a violent rush forward or attack.

A Charge to Keep I Have
by Charles Wesley

A charge to keep I have,
A God to glorify!
A never-dying soul to save,
And fit it for the sky;

To serve the present age,
My calling to fulfil;
O may it all my powers engage
To do my Master's will.

Arm me with jealous care,
As in Thy sight to live;
And, O Thy servant, Lord, prepare
A strict account to give.

Help me to watch and pray,
And on Thyself rely;
Assured, if I my trust betray,
I shall for ever die.