My first reaction was to be afraid
This ardor was a snare the Devil had laid;
And I avoided you as a temptation
That might stand in the way of my salvation.
But finally I knew, O gracious beauty,
That passion need not be at odds with duty,
That I can reconcile it with propriety;
And so I yield to it without anxiety.
 
[D’abord j’appréhendai que cette ardeur secrète
Ne fût du noir esprit une surprise adroite;
Et même à fuir vos yeux mon cœur se résolut,
Vous croyant un obstacle à faire mon salut.
Mais enfin je connus, ô beauté tout aimable!
Que cette passion peut n’être point coupable,
Que je puis l’ajuster avecque la pudeur;
Et c’est ce qui m’y fait abandonner mon cœur.]

Molière (1622-1673) French playwright, actor [stage name for Jean-Baptiste Poquelin]

Tartuffe, or the Hypocrite [Le Tartuffe, ou L’Imposteur], Act 3, sc. 3 (1669) [tr. Frame (1967)]
    (Source)

Tartuffe plays the "It can't be wrong if it feels so right" seduction card. "Modesty" is used here in many of the translations in its meaning of moderate behavior or avoidance of sexual explicitness.

(Source (French)). Alternate translations:

At first I was under Apprehension lest this secret Flame might be a dexterous Surprize of the foul Fiend; and my Heart even resolv'd to avoid your Eyes, believing you an Obstacle to my future Happiness. But at length I perceiv'd, most lovely Beauty, that my passion could not be blameable, that I could reconcile it with Modesty, and this made me abandon my Heart to it.
[tr. Clitandre (1672)]

At first I feared that this secret ardour might be nothing but a cunning snare of the foul fiend; and my heart even resolved to fly your presence, thinking that you might be an obstacle to my salvation. But at last I found, oh most lovely beauty, that my passion could not be blameable; that I could reconcile it with modesty; and this made me feely indulge it.
[tr. Van Laun (1876)]

At first I feared that this secret tenderness might be a skilful assault of the evil one; I event hought I would avoid your presence, fearing you might prove a stumbling-block to my salvation. But I have learnt, O adorable beauty, that my passion need not be a guilty one; that i can reconcile it with modesty; and I have given up my whole soul to it.
[tr. Wall (1879)]

At first I was afraid lest this secret flame might be a subtle surprise of the evil one; and my heart resolved to avoid your eyes as an obstacle to my future happiness; but at length I perceived, most lovely beauty, that: my passion could not be guilty; that I could reconcile it with the rules of modesty, and this made me yield my heart to it.
[tr. Mathew (1890)]

At first I feared lest this secret tenderness might be but an artful assault of the evil one; and my heart even resolved to flee from your eyes, fearing you might be a stumbling-block in the way of my salvation. But at last I learnt, ah! most entrancing beauty, that this passion need not be a guilty one, that I cuold reconcile it with modesty, and so I have let my heart give way to it.
[tr. Waller (1903)]

At first I trembled lest this secret love
Might be the Evil Spirit's artful snare;
I even schooled my heart to flee your beauty,
Thinking it was a bar to my salvation.
But soon, enlightened, O all lovely one,
I saw how this my passion may be blameless,
How I may make it fit with modesty,
And thus completely yield my heart to it.
[tr. Page (1909)]

At first I trembled, lest my secret flame
Should be a stratagem of the Evil One;
Even, I was resolved to flee your presence,
A possible obstacle to my salvation.
But finally I realized, my fair one,
That there need be no guilt in such a passion.
That I can make it chime with modesty;
And so I let my heart follow its bent.
[tr. Bishop (1957)]

At first, I trembled, lest that love should be
A subtle snare that Hell had laid for me;
I vowed to flee the sight of you, eschewing
A rapture that might prove my soul's undoing;
But soon, fair being, I became aware
That my deep passion could be made to square
With rectitude, and with my bounden duty.
I thereupon surrendered to your beauty.
[tr. Wilbur (1963)]

At first I feared that this secret passion was a clever temptation of the Evil One, and I even tried to avoid you, thinking you might be an obstacle to my salvation. But at last, most adorable beauty, I recognized that such love need not be sinful, that I could reconcile it with decency, and I surrendered to it.
[tr. Steiner (2008)]