Sincerity is an openness of heart, which shows us what we are, a love of truth, a dislike to deception, a wish to compensate our faults and to lessen them by the merit of confessing them.
 François de La Rochefoucauld, Reflections; or Sentences and Moral Maxims (1665). copy citation

add
Author François de La Rochefoucauld
Source Reflections; or Sentences and Moral Maxims
Topic openness sincerity
Date 1665
Language English
Reference
Note Translated by J. W. Willis Bund
Weblink http://www.gutenberg.org/files/9105/9105-h/9105-h.htm

Context

“CXXV.—A man to whom no one is pleasing is much more unhappy than one who pleases nobody. REFLECTIONS ON VARIOUS SUBJECTS, BY THE DUKE DE LA ROCHEFOUCAULD I. On Confidence. Though sincerity and confidence have many points of resemblance, they have yet many points of difference. Sincerity is an openness of heart, which shows us what we are, a love of truth, a dislike to deception, a wish to compensate our faults and to lessen them by the merit of confessing them. Confidence leaves us less liberty, its rules are stricter, it requires more prudence and reticence, and we are not always free to give it. It relates not only to ourselves, since our interests are often mixed up with those of others;” source