Why do I feel like a different person than I was a year ago?
You feel like a different person because you probably are one, in some specific ways, and your disorientation is a reasonable response to a real thing that happened to you.
Why Change Hides From You
Change tends to be invisible from the inside because it is continuous. You were present for every small adjustment, every quiet shift in what you tolerated or wanted, so nothing felt like a crossing. The person who went through a hard year does not experience a before and after. They experience a series of ordinary days, and only later do they look back and realize the ground moved under them. This is not a failure of self-awareness. It is a structural feature of living through something rather than watching it from outside. What you notice now is the distance between where you are standing and where you remember standing, and that gap is the only evidence you have.
What Actually Shifts
The things most likely to change in a year are not your core appetites but your relationship to them. What you are willing to say out loud. Which situations you walk into and which ones you find an excuse to leave. What kind of tired you are at the end of a week. A person's values rarely flip; what changes is the cost they are willing to pay to act on them. If you were someone who stayed quiet to keep the peace, and you are not doing that anymore, the value underneath, wanting connection, probably has not changed. What changed is your estimate of what the quiet was costing you.
Memory Is a Bad Witness
The cruelest part of trying to measure personal change is that the instrument you use to measure it, memory, is the least reliable one available. Memory does not store a fixed copy of who you were. It reconstructs the past using who you are now, which means your earlier self gets quietly updated to agree with your current self in ways you will never catch. You remember past-you as more like current-you than past-you actually was. This is why people say 'I always knew I wanted this' about things they spent years avoiding, or 'I never really liked that' about things they clearly did. You cannot trust your own archive because it rewrites itself without permission.
What Would Actually Help You Know
The honest ceiling here is that you cannot measure a change you only remember. What you can do is look at evidence that was fixed before you changed. Old texts, a journal entry with a date on it, a conversation someone else recalls differently than you do. These things hold the earlier version instead of updating it. If you had written something down a year ago, something about what mattered to you and what you were struggling with, you could read it now and see the actual distance rather than the reconstructed one. The comparison would be specific and dated, not a feeling. LUX starts with a free reading, six open questions, takes about eight minutes, and gives you one word and a card dated the day you begin. From there, the record grows with you and compresses into readings that describe who you are now. It keeps the earlier version instead of overwriting it, which is the one thing your memory will not do for you.
When this runs your life, it usually traces to one underlying pattern. For this, it is most often the Keeper rhythm, the thing under the behavior.
Where to take this
You cannot check this against memory, because memory quietly edits the earlier version to agree with the current one. The drift checker takes something you wrote a while back and something you wrote recently and names what actually moved and what held. Free, no signup, and nothing you paste is kept.