His wife's dowry made it possible for him to buy an estate in Kostheim, where he followed the call of the French philosopher Jean-Jacques Rousseau by getting back to nature, and became a farmer.
On 21 March 1793, the convention sent the naturalist and writer Georg Forster, the merchant André Potocki, and him to Paris, to complete the planned accession to France.
In Paris he met several German friends of freedom, such as Konrad Engelbert Oelsner and Johann Georg Kerner, who shared his disappointment with the development of the Revolution.
With the publication of provoking pamphlets, in which he justified the killing as an act of liberation, he was apparently risking his life deliberately, although not all motives of his behavior at this time are comprehensible nowadays, especially those concerning his relation to Corday and her actions.
After giving up the intention of publicly killing himself in front of the National Convention, in order to protest against the violence of revolutionary goals, he set out to be executed by his former political friends.