... inability, therefore, of a parent or [Pg 32]teacher, to produce equal effects by its means, may be good enough proof of his want of skill, but it is no proof of the want of inherent power in ... how he is to do it. Such a line of conduct should be imperatively demanded of the teacher, both on account of the importance of his work, and of the immense value of the material upon which he ... progress of truth, is truly humiliating; yet every page of history, which records the developement of new principles, exhibits also the outbreakings of prejudice and selfishness. The deductions of...