He who does not give himself leisure to be thirsty cannot take pleasure in drinking.

[Qui ne se donne loisir d’avoir soif, ne sçauroit prendre plaisir à boire.]

Michel de Montaigne (1533–1592) French essayist
Essays, Book 1, ch. 42 (1.42), “Of the Inequality among Us [De l’inequalité qui est entre nous]” (1572) [tr. Frame (1943)]
    (Source)

On how having an appetite always sated removes the pleasure of sating it.

This essay and passage were in the first (1580) edition.

(Source (French)). Other translations:

He that cannot stay till he be thirstie, can take no pleasure in drinking.
[tr. Florio (1603)]

He who anticipates thirst, can never find the true pleasure of drinking.
[tr. Cotton (1686)]

He who will not give himself leisure to be thirsty can never find the true pleasure of drinking.
[tr. Cotton/Hazlitt (1877)]

He who does not permit himself to be thirsty can not take pleasure in drinking.
[tr. Ives (1925)]

If a man does not give himself time to get thirsty he will never enjoy drinking.
[tr. Screech (1987)]