Of all the gifts Thine hand bestows,
Thou Giver of all good!
Not heaven itself a richer knows
Than my Redeemer's blood.

Faith too, the blood-receiving grace,
From the same hand we gain;
Else, sweetly as it suits our case,
That gift had been in vain.

Till Thou Thy teaching power apply,
Our hearts refuse to see,
And weak, as a distemper'd eye,
Shut out the view of Thee.

Blind to the merits of Thy Son,
What misery we endure!
Yet fly that Hand from which alone
We could expect a cure.

We praise Thee, and would praise Thee more,
To Thee our all we owe:
The precious Saviour, and the power
That makes Him precious too.

William Cowper

http://www.poemhunter.com/poem/olney-hymn-64-praise-for-faith/