The more I see of people, the more I love my dog.
[Je mehr ich von den Menschen sehe, um so lieber habe ich meinen Hund.]
Frederick II (1712-1786) King of Prussia (Frederick the Great, Friedrich der Große)
(Attributed)
This quote is widely attributed to Frederick, but I cannot find a primary or contemporary citation. The earliest attribution to Frederick I find is in a comment attributed to Otto von Bismarck in French historian Constantin de Grünwald, Bismarck (1949):«Je suis comme Frederic II», dit-il à Radowitz: «Plus j'apprends à connaitre les hommes, plus je me mets à aimer les chiens.»
["I am like Frederick II," he told Radowitz: "The more I get to know men, the more I start to love dogs."]
[Google Translate]
As the earliest (unattributed) versions of this quote predate Bismark's adulthood, it is unlikely the formulation is originally his.
The quote is often misattributed to Charles de Gaulle, based on an article (1967-12-08), "Some General Comments, Entre Nous," Time Magazine, on political writer Jean-Raymond Tournoux's best-seller, La Tragédie du Général (1967). The article mistakes a use of the French phrase (translated as "The better I get to know men, the more I find myself loving dogs") as an attribution to De Gaulle, which, in context, it is a reference to the Bismarck quote above (and is in fact footnoted to de Grünwald's Bismarck):Dans le petit parc, la ronde familière continue. Au passage, le chien «Vincam», berger allemand au pédigrée rare, tire sa longue, longue chaine: «Une chose me torture», dit de Gaulle... «Cet animal enchainé ... C’est impossible ... Je ne peux plus le voir ... Donnez-le à l’amiral Ortoli.»
Sur ce terrain, il se sent de plain-pied avec Frederic II, avec Bismarck: «Plus j'apprends à connaitre les hommes, plus je me mets à aimer les chiens.»
[In the small park, the familiar round continues. As we pass, the dog "Vincam," a German shepherd with a rare pedigree, pulls on his long, long chain: "One thing is torturing me," says de Gaulle ... "This chained animal ... It's impossible ... I can't stand it anymore ... Give it to Admiral Ortoli."
On this ground, he feels on the same level as Frederick II, from Bismarck: "The better I get to know men, the more I find myself loving dogs."]
[Google Translate]
The same quote is also attribute to Blaise Pascal ("Plus je vois les hommes, plus j'aime mon chien"). I cannot find a primary source of his saying it, but it is attributed to him in an inscription in the Cimetière des Chiennes in Asnières on the Ile de la Recetre on the Seinne (1, 2, 3).
Similarly, it is often attributed to Madame Germaine de Staël ("The more I know men, the more I love dogs"). Again, I can find only attributions, not a primary souce (1, 2, 3) .
For additional discussion about this quotation and its origins, see:

