2 Corinthians 12:9: My grace is sufficient for thee

Must I be tried and tortured still?
I yield to Thy mysterious will;
But give me, Lord, to prove
In nature's utter helplessness,
The strength of all-sufficient grace,
The' omnipotence of love.
Ir hath for me sufficient been:
Thy justifying grace,
Which now preserves my soul from sin,
Shall keep me all my days:
Saviour, Thy sanctifying love
Shall its own work complete,
And fit me for the realms above,
And place me on Thy seat.