A fountain will be opened to the house of David and the inhabitants of Jerusalem, to cleanse them from sin and impurity.@Zechariah 13:1
William Cowper (1731-1800)

Will­iam Cow­per, in Con­yer’s Col­lect­ion of Psalms and Hymns, 1772.

Cleans­ing Fount­ain, 19th Cen­tu­ry Amer­i­can camp meet­ing tune (MIDI, NWC, PDF).

This is one of the first hymns Cow­per wrote af­ter his first at­tack of tem­po­ra­ry mad­ness. Cow­per had been prom­ised a post as Clerk of the Jour­nal to the House of Lords, but was dis­mayed up­on learn­ing he would have to un­der­go a pub­lic ex­am­in­a­tion in the House be­fore be­gin­ning his du­ties. The fol­low­ing ar­ti­cle from the North Amer­i­can Re­view, Jan­u­a­ry, 1834, de­scribes his di­lem­ma, and how God pre­vent­ed him from de­stroy­ing him­self:

As the time drew nigh, his ag­o­ny be­came more and more in­tense; he hoped and be­lieved that mad­ness would come to re­lieve him; he at­tempt­ed al­so to make up his mind to com­mit su­i­cide, though his con­science bore stern tes­ti­mo­ny against it; he could not by any ar­gu­ment per­suade him­self that it was right, but this des­per­a­tion pre­vailed, and he pro­cured from an apoth­e­c­ary the means of self-de­struct­ion. On the day be­fore his pub­lic ap­pear­ance was to be made, he hap­pened to no­tice a let­ter in the news­pa­per, which to his dis­or­dered mind seemed like a ma­lig­nant li­bel on him­self. He im­med­i­ate­ly threw down the pa­per and rushed into the fields, de­ter­mined to die in a ditch, but the thought struck him that he might es­cape from the count­ry. With the same vi­o­lence he pro­ceed­ed to make has­ty prep­ar­a­tions for his flight; but while he was en­gaged in pack­ing his port­man­teau his mind changed, and he threw him­self into a coach, or­der­ing the man to drive to the Tow­er wharf, in­tend­ing to throw him­self in­to the ri­ver, and not re­flect­ing that it would be im­poss­i­ble to ac­comp­lish his pur­pose in that pub­lic spot. On ap­proach­ing the wa­ter, he found a por­ter seat­ed up­on some goods: he then re­turned to the coach and was con­veyed to his lodg­ings at the Tem­ple. On the way he at­tempt­ed to drink the laud­a­num, but as oft­en as he raised it, a con­vuls­ive agi­ta­tion of his frame pre­vent­ed it from reach­ing his lips; and thus, re­gret­ting the loss of the op­por­tun­i­ty, but un­a­ble to avail him­self of it, he ar­rived, half dead with an­guish, at his apart­ment. He then shut the doors and threw him­self upon the bed with the laud­a­num near him, try­ing to lash him­self up to the deed; but a voice within seemed con­stant­ly to for­bid it, and as of­ten as he ex­tend­ed his hand to the poi­son, his fing­ers were con­tract­ed and held back by spasms.

At this time one of the in­mates of the place came in, but he con­cealed his ag­i­ta­tion, and as soon as he was left alone, a change came over him, and so de­test­a­ble did the deed ap­pear, that he threw away the laud­a­num and dashed the vi­al to piec­es. The rest of the day was spent in hea­vy in­sens­i­bil­i­ty, and at night he slept as us­u­al; but on wak­ing at three in the morn­ing, he took his pen­knife and lay with his weight upon it, the point toward his heart. It was brok­en and would not pen­e­trate. At day break he arose, and pas­sing a strong gar­ter around his neck, fast­ened it to the frame of his bed: this gave way with his weight, but on se­cur­ing it to the door, he was more suc­cess­ful, and re­mained sus­pend­ed till he had lost all con­scious­ness of ex­ist­ence. After a time the gar­ter broke and he fell to the floor, so that his life was saved.; but the con­flict had been great­er than his rea­son could en­dure. He felt for him­self a con­tempt not to be ex­pressed or im­ag­ined; when­ev­er he went into the street, it seemed as if ev­ery eye flashed up­on him with in­dig­na­tion and scorn; he felt as if he had of­fend­ed God so deep­ly that his guilt could ne­ver be for­giv­en, and his whole heart was filled with tu­mult­u­ous pangs of des­pair. Mad­ness was not far off, or rather mad­ness was al­ready come.

Af­ter re­cov­er­ing, Cow­per came to real­ize how God can erase the stain of any sin.

There is a fountain filled with blood drawn from Emmanuel’s veins;
And sinners plunged beneath that flood lose all their guilty stains.
Lose all their guilty stains, lose all their guilty stains;
And sinners plunged beneath that flood lose all their guilty stains.

The dying thief rejoiced to see that fountain in his day;
And there have I, though vile as he, washed all my sins away.
Washed all my sins away, washed all my sins away;
And there have I, though vile as he, washed all my sins away.

Dear dying Lamb, Thy precious blood shall never lose its power
Till all the ransomed church of God be saved, to sin no more.
Be saved, to sin no more, be saved, to sin no more;
Till all the ransomed church of God be saved, to sin no more.

E’er since, by faith, I saw the stream Thy flowing wounds supply,
Redeeming love has been my theme, and shall be till I die.
And shall be till I die, and shall be till I die;
Redeeming love has been my theme, and shall be till I die.

Then in a nobler, sweeter song, I’ll sing Thy power to save,
When this poor lisping, stammering tongue lies silent in the grave.
Lies silent in the grave, lies silent in the grave;
When this poor lisping, stammering tongue lies silent in the grave.

Lord, I believe Thou hast prepared, unworthy though I be,
For me a blood bought free reward, a golden harp for me!
A golden harp for me, a golden harp for me;
For me a blood bought free reward, a golden harp for me!

’Tis strung and tuned for endless years, and formed by power divine,
To sound in God the Father’s ears no other name but Thine;
No other name but Thine, no other name but Thine;
To sound in God the Father’s ears no other name but Thine.