Self-consistency bias
Also known as Consistency bias
Self-consistency bias is remembering your past attitudes and behavior as more similar to your current ones than they really were. We quietly rewrite our own history so that we seem to have always been the same.
In everyday life
Someone who now supports a policy remembers always having supported it, though they argued against it a few years ago.
Now that you love spicy food, you tell friends you always did, until your sister reminds you that as a teenager you refused anything hotter than ketchup.
Why your mind does this
Imagining the past and the future is hard, so the brain uses the present as a template. Assuming things will stay roughly as they are now is a quick and usually workable guide. Making sense of events after the fact also helps us learn lessons and feel in control.
Its family, in 30 seconds: Projecting ourselves
How to spot it
Ask whether you have evidence of what you actually thought back then, or only your present view cast backward.
How to counter it
Reread old journals, emails or messages to see how your views have really changed over time.