I found this following passage in Montaigne through Keck’s annotations on Browne:
Reflecting as I often do on the ridiculous excoriations of that pleasure, the absurd, mindless, stupefying emotions with which it disturbs a Zeno or a Cratippus, that indiscriminate raging, that face inflamed with frenzy and cruelty at the sweetest point of love, that grave, severe, ecstatic face in so mad an activity, the fact that our delights and our waste-matters are lodged higgledy-piggledy together; and that its highest pleasure has something of the groanings and distraction of pain, I believe that what Plato says is true: Man is the plaything of the gods—
quænam ista jocandi
[what a ferocious way of jesting!]
—and that it was in mockery that Nature bequeathed us this, the most disturbing of activities, the one most common to all creatures, so as to make us all equal, bringing the mad and the wise, men and beasts, to the same level.
When I picture to myself the most reflective and the most wise of men in such postures, I hold it as an effrontery that he should claim to be reflective and wise; like the legs on a peacock, they humble pride;
ridentem dicere verum
[what can stop us telling the truth with a laugh?]
Those who reject serious opinions in the midst of fun are, it is said, like the man who refuses to venerate the statue of a saint because it wears no drapery.
Michel de Montaigne, The Complete Essays, Book III, Chapter 5 (Translated by M.A. Screech)