I know very well that women seem to be of too weak a nature to be trusted with secrets
 Plutarch, Parallel Lives (c. 100 AD). copy citation

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Author Plutarch
Source Parallel Lives
Topic trust women
Date c. 100 AD
Language English
Reference
Note Translated by A. H. Clough
Weblink http://www.gutenberg.org/files/674/674-h/674-h.htm

Context

“but from me, what evidence of my love, what satisfaction can you receive, if I may not share with you in bearing your hidden griefs, nor be admitted to any of your counsels that require secrecy and trust? I know very well that women seem to be of too weak a nature to be trusted with secrets; but certainly, Brutus, a virtuous birth and education, and the company of the good and honorable, are of some force to the forming our manners; and I can boast that I am the daughter of Cato and the wife of Brutus, in which two titles though before I put less confidence, yet now I have tried myself, and find that I can bid defiance to pain."” source