Protrepticus (Greek: Προτρεπτικός) is a philosophical work by Aristotle that encouraged the young to study philosophy. It survives only in fragments and is considered a lost work.
Since the 19th century, when inquiry was initiated by Jakob Bernays (1863), several scholars have attempted to reconstruct the work. Attempted reconstructions include:
The book The works of Aristotle (1908, p. viii) mentioned
A book review of Exhortations to Philosophy (2015), mentioned
Clark (1989), mentioned
Elias in Porph. 3. 17-23. We may also reason as Aristotle does in his Protrepticus, in which he encourages young men to philosophize. He says this: If we ought to philosophize we ought to philosophize, and if we ought not to philosophize we ought to philosophize; in either case, therefore, we ought to philosophize. If philosophy exists we ought certainly to philosophize, because philosophy exists; and if it does not exist, even so we ought to examine why it does not exist, and in examining this we shall be philosophizing, because examination is what makes philosophy. (p. 28)
Pierre Hadot (into French), Michael Chase (translator into English of Hadot's volume):
Hutchinson and Johnson
Excerpt from a speech by the character ‘Aristotle’ (Hutchinson and Johnson, p. 12)