There are two things which cannot be attacked in front: ignorance and narrow-mindedness. They can only be shaken by the simple development of the contrary qualities. They will not bear discussion.
Lord Acton Dalberg (1834 - 1902)
Source: Letter, 23 Jan 1861; in Lord Acton and his Circle, ed. Abbot Gasquet, 1906.
Contributed by: Zaady