sincerity

noun

Etymology: From Middle English sinceritie, from Old French sincerité and Medieval Latin sincēritās; both from Latin sincēritās, from sincērus + -tās. Equivalent to sincere + -ity.

1. The quality or state of being sincere.

   “I protest, in the sincerity of love.”

   “If the shew of any thing be good for any thing, I am sure sincerity is better”