Full Idea
Inquiry is the cause of philosophy.
Gist of Idea
Inquiry is the cause of philosophy
Source
Aristotle (Protrepticus (frags) [c.334 BCE]), quoted by Alexander Nehamas - Eristic,Antilogic,Sophistic,Dialectic p.120
Book Reference
Nehamas,Alexander: 'Virtues of Authenticity' [Princeton 1999], p.120
A Reaction
The earlier part of the quote says philosophical thinking is inescapable (even if philosophy is impossible). I suppose we would call it 'curiosity'.