The sinner’s own fault? So it was

The sinner’s own fault? So it was.
If every own fault found us out,
Dogged us and hedged us round about,
What comfort should we take because
Not half our due we thus wrung out?

Clearly his own fault. Yet I think
My fault in part, who did not pray
But lagged and would not lead the way.
I, haply, proved his missing link.
God help us both to mend and pray.