Source identified1
“One principal of action is sufficient—Respect thyself.”
Wollstonecraft makes self-respect a moral standard rather than self-flattery: conduct should remain compatible with one’s own sense of truth and justice instead of being reorganized around gaining a respectable social position.
Source note: An Historical and Moral View of the Origin and Progress of the French Revolution, Project Gutenberg #68724. Wollstonecraft connects “Respect thyself” with religion, justice and self-love while criticizing social arrangements that encourage people to sacrifice truthful character for status.