Was Jesus imperfect when He walked this earth?
We believe that Jesus never lost His divinity. In Jesus there is One Person (The Word, God the Son, Second Person of the Blessed Trinity) and two natures — the divine, which He possessed from the beginning and the human which he acquired in time from His Mom. A dissertation on the difference between person and nature is not my intention to give.
But the birth of Jesus was a unique event, never to be repeated, in the history of this universe as far as we know.
He had to become human in order to save mankind. Was His humanity different from yours, mine or Joe Blow’s? No, or else He would not have been able to buy yours, mine or Joe Blow’s salvation. Was His humanity perfect? Is yours? We are now mixing grapes and blueberries.
But my original premise was that perfection itself cannot be attained in the created because this would mean that the Creator (who is perfection) would have repeated Himself in creation which would be philosophically absurd.