Quotations about:
    self-analysis

He who tries to make his happiness depend too much on his reason, who holds it up for examination, who quibbles, as it were, with his delights, and admits no indelicate pleasures, ends by having none at all. He is a man who cards the wool of his mattress until nothing is left, and he ends by sleeping on the boards.

[Celui qui veut trop faire dépendre son bonheur de sa raison, qui le soumet à l’examen, qui chicane, pour ainsi dire, ses jouissances, et n’admet que des plaisirs délicats, finit par n’en plus avoir. C’est un homme qui, à force de faire carder son matelas, le voit diminuer, et finit par coucher sur la dure.]

Nicolas Chamfort (1741-1794) French writer, epigrammist (b. Nicolas-Sébastien Roch)

Products of Perfected Civilization [Produits de la Civilisation Perfectionée], Part 1 “Maxims and Thoughts [Maximes et Pensées],” ch. 2, ¶ 179 (1795) [tr. Merwin (1969)]
    (Source)

(Source (French)). Alternate translations:

He who allows his happiness to depend too much on reason, who submits his pleasures to examination, and desires enjoyments only of the most refined nature, too often ends by not having any at all.
[tr. De Finod (1884)]

The man who makes his happiness too subject to his reason, who submits it to examination, who, as it were, quibbles with his enjoyment and recognizes only fastidious pleasures, will finish by having none at all. He is as one who makes his mattress smaller and smaller with assiduous carding until he ends by sleeping on the wood.
[tr. Mathers (1926)]

One who wishes to make his happiness too much dependent on his reason, who examines his happiness closely, and who so to say quibbles with his enjoyments, ends by no longer having any. He is one who, by dint of having his mattress carded, sees it dwindle, and finishes by sleeping on the bare boards.
[tr. Pearson (1973)]

Someone who wants his happiness to be too supported by reason, who examines it, who so to say quibbles over what he enjoys, and only allows himself pleasures that have delicacy, ends by not having any. He is a man who, because he wants his mattress to fit perfectly on his bed, continuously has to make it smaller, and ends up sleeping on the floor.
[tr. Siniscalchi (1994)]

Anyone who relies too heavily on reason to achieve happiness, who analyses it, who so to speak quibbles over his enjoyment and can accept only refined pleasures, ends up not having any at all. He's like a man who wants to get rid of all the lumps in his mattress and eventually ends up sleeping on bare boards because he's made it too small.
[tr. Parmée (2003), ¶ 135]