“Good manners reflect something from inside-an innate sense of consideration for others and respect for self.”
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Emily Post 2
American etiquette expert 1872–1960Related quotes
Charles Eisenstein, The Longing for Belonging http://www.huffingtonpost.com/charles-eisenstein/indigeneity-and-belonging_b_8011302.html, Huffington Post, 20 August 2015

“Beauty is how you feel inside, and it reflects in your eyes. It is not something physical.”
As quoted in Morrow's International Dictionary of Contemporary Quotations (1982) by Jonathon Green, p. 340.

“Respect for ourselves guides our morals; respect for others guides our manners”

Nicholas Wood, Jill Sherman, Sheila Gunn, "Major gives seal of approval to Tories' right-wing agenda", The Times, 9 October 1993
Conservative Party conference speech, 8 October 1993. The phrase was associated with personal morality and backfired when a succession of senior Conservatives fell to scandals that winter.
1990s, 1993

“Remember, there is nothing wrong with a healthy sense of self-respect.”
Source: How to Steal a Dragon's Sword
2002

1860s, The Conduct of Life (1860), Behavior

On seeing a 1956 performance by Billie Holiday, Talking to Myself Bk. 4 (1973) Ch. 4

Source: What is Anthropology? (2nd ed., 2017), Ch. 9 : Social Identity