Reproof is a medicine, like mercury or opium; if it be improperly administered, it will do harm instead of good.
Horace Mann (1872). “Thoughts Selected from the Writings of Horace Mann ...”, p.211
![Reproof is a medicine, like mercury or opium; if it be improperly administered, it will do harm instead of good.](http://cdn.myquotes.org/images/horace-mann/reproof-is-a-medicine-like-mercury-or-opium-if-it-be-improperly-administered-it-will-do-harm-instead-of-good.jpg)
Reproof is a medicine, like mercury or opium; if it be improperly administered, it will do harm instead of good.