Sincerity is a mix of seriousness and honesty. If you do things with sincerity, people will trust you.

Along with patience and compassion, sincerity is one of those qualities we all probably wish we had more of — and wish other people had more of, too. People who show sincerity are being serious, kind, and truthful. Politicians who show sincerity tend to do well because people believe them. An apology full of sincerity will probably be accepted. On the other hand, if you show no sincerity — by being sarcastic or dismissive — well, who wants an apology like that?

Definitions of sincerity
  1. noun
    the quality of being open and truthful; not deceitful or hypocritical
    “his sincerity inspired belief”
    “they demanded some proof of my sincerity
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    falseness, hollowness, insincerity
    the quality of not being open or truthful; deceitful or hypocritical
    heartiness, wholeheartedness
    the quality of hearty sincerity
    singleness, straightforwardness
    without hypocrisy
    type of:
    the quality of being truthful
  2. noun
    a quality of naturalness and simplicity
    “the simple sincerity of folk songs”
    synonyms: unassumingness
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    type of:
    the quality of being natural or based on natural principles
  3. noun
    the trait of being serious
    synonyms: earnestness, serious-mindedness, seriousness
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    frivolity, frivolousness
    the trait of being frivolous; not serious or sensible
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    commitment, committedness
    the trait of sincere and steadfast fixity of purpose
    graveness, gravity, soberness, sobriety, somberness, sombreness
    a manner that is serious and solemn
    sedateness, solemness, solemnity, staidness
    a trait of dignified seriousness
    the commitment of something other than money (time, energy, or effort) to a project with the expectation of some worthwhile result
    stodginess, stuffiness
    dull and pompous gravity
    type of:
    a distinguishing feature of your personal nature
  4. noun
    an earnest and sincere feeling
    synonyms: earnestness, seriousness
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    type of:
    gravity, solemnity
    a solemn and dignified feeling
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