This prayer has been used by Methodists since the late 1700s. John Wesley and his followers often used it in services for Christians to continually and publicly renew their commitment to God. It is a prayer of willingness, surrender, and consecration.

I am yours, I am bought with a price 
I need you and long to trust you more, 
In and past my feelings and circumstances. I am no longer my own, but wholly belong to you. Put me to what you will; rank me with whom you will. Put me to doing; put me to suffering; I am freely yours. Let me be successful for you, or laid aside for you. Exalted for you, or brought low for you. 
Let me be full, let me be empty. 
Let me have all, let me have nothing. 
Release my hold on temporal things, 
Things that are not means to further know you, And make you known. 
All that I am and all that I possess, 
I yield to your good will and pleasure. 
And now, glorious and blessed God, 
Father, Son and Holy Spirit, 
You are mine, and I am yours. 
Now and hence and evermore. 
Amen.