Full Idea
If philosophy were a matter of choice between rival theories, then it would be sound to teach it historically. But if it is not, then it is a fault to teach it historically, because it is quite unnecessary; we can tackle the subject direct.
Gist of Idea
The history of philosophy only matters if the subject is a choice between rival theories
Source
Ludwig Wittgenstein (Lectures 1930-32 (student notes) [1931], C V A)
Book Reference
Wittgenstein,Ludwig: 'Lectures in Cambridge 1930-32', ed/tr. Lee,Desmond [Blackwell 1980], p.74
A Reaction
Wittgenstein was a bit notorious for not knowing the history of the subject terribly well, and this explains why. Presumably our tackling the subject direct will not have the dreadful consequence of producing yet another theory.
Related Idea
Idea 16604 Philosophy consists of choosing between Plato, Aristotle and Democritus [Pasnau]