Acceptance

James Lee-Milne (1908-1997), diary entry for November 19, 1972, in A Mingled Measure: Diaries 1953-1972 (London: John Murray, 1994), p. 300:

Sarah [Churchill] used to accompany him [her father, Winston Churchill] on his walks round the estate [Chartwell]. He enjoyed scratching the pigs' backs. He said to her, 'Dogs look up to man. Cats look down on man. But pigs accept him as one of themselves.'

George Morland (1763-1804), A Boy Looking into a Pig Sty
Hat tip: Ian Jackson (who supplied the material in brackets).