Zwingli was on a mineral-springs vacation in August, 1519, when the Black Death broke out in Zurich. Though weak already from exhausting work, he hurried back to his city to minister to victims. Before long he himself caught the disease and seemed likely to perish. But his work not yet done, Zwingli recovered. His famous “plague hymn” recounts his sense of trust and then his joy at regaining health. Stanzas 1–4 were written as the disease first struck, stanzas 5–8 as his health deteriorated. Upon his recovery he finished the final four quatrains.

Help me, O Lord,
My strength and rock;
Lo, at the door
I hear death’s knock.

Uplift thine arm,
Once pierced for me,
That conquered death.
And set me free.

Yet, if thy voice,
In life’s midday.
Recalls my soul,
Then I obey.

In faith and hope
Earth I resign.
Secure of heaven.
For I am Thine.

My pains increase;
Haste to console;
For fear and woe
Seize body and soul.

Death is at hand.
My senses fail.
My tongue is dumb;
Now, Christ, prevail.

Lo! Satan strains
To snatch his prey;
I feel his grasp;
Must I give way?

He harms me not,
I fear no loss,
For here I lie
Beneath thy cross.

My God! My Lord!
Healed by thy hand.
Upon the earth
Once more I stand.

Let sin no more
Rule over me;
My mouth shall sing
Alone to thee.

Though now delayed,
My hour will come.
Involved, perchance.
In deeper gloom.

But, let it come;
With joy I’ll rise,
And bear my yoke
Straight to the skies.