Seneca the Younger Quotes - Page 34
"Epistolæ Ad Lucilium" by Marcus Fabius Quintilianus as reported in "Hoyt's New Cyclopedia Of Practical Quotations" by Jehiel Keeler Hoyt, p. 878-82., 1922.
What a great blessing is a friend with a heart so trusty you may safely bury all your secrets in it.