But it is one thing to show a man that he is in an error, and another to put him in possession of truth
An Essay Concerning Human Understanding - Página 463 http://books.google.com.br/books?id=YxwGAAAAQAAJ&pg=PA463, de John Locke - Publicado por W. Tegg, 1849 - 564 páginas
Variante: Uma coisa é mostrar a um homem que ele está errado e outra coisa é instruí-lo com a Verdade.
It is one thing to show a man that he is in error, and another to put him in possession of the truth.
Book IV, Ch. 7, sec. 11
An Essay Concerning Human Understanding (1689)