From John Donne’s Divine Poems (no. 3 in the Holy Sonnets from the Westmoreland MS):
Oh, to vex me, contraryes meete in one:
Inconstancy unnaturally hath begott
A constant habit; that when I would not
I change in vowes, and in devotione.
As humorous is my contritione
As my prophane love, and as soone forgott:
As ridlingly distemperd, cold and hott,
As praying, as mute; as infinite, as none.
I durst not view heaven yeserday; and to day
In prayers, and flattering speaches I court God:
To morrow I quake with true feare of his rod.
So my devout fitts come and go away
Like a fantastique Ague: save that here
Those are my best dayes, when I shake with feare.
The editor of my edition – Helen Gardner for the 1952 Oxford English Texts volume- had nothing to say on this in her commentary.
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