Full Idea
As far as any intelligent being can repeat the idea of any past action with the same consciousness it had of it at first, and with the same consciousness it has of any present action; so far it is the same personal self.
Gist of Idea
Identity over time involves remembering actions just as they happened
Source
John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 2.27.10)
Book Reference
Locke,John: 'Essay Concerning Human Understanding', ed/tr. Nidditch,P.H. [OUP 1979], p.336
A Reaction
Reid's criticism of 'same' (Idea 1368).
Related Idea
Idea 1368 Locke mistakes similarity of a memory to its original event for identity [Reid on Locke]