Final answer:
The October precept in 'Wonder' by R. J. Palacio is 'Your deeds are your monuments.' This precept emphasizes the importance of actions and their lasting impact.
Step-by-step explanation:
The October precept in the book 'Wonder' by R. J. Palacio is: 'Your deeds are your monuments.' Mr. Browne, a teacher in the book, introduces a new precept each month to his students. August, the main character, may find this precept significant because it emphasizes the importance of actions and how they can make a lasting impact.