That's a thoughtful question about our personalities . The truth is that I know myself more than anyone else ...deep down I know wen I hv changed from a particular habit or not
However, I can attest to the best version of myself and when people commend on it too, it becomes another confirmation
My thought though
So what if you hear from someone "ah you've change o, I like the former you" do you believe or you take time to check if it is true?
It depends on the person saying it and what kind of change he or she is talking about , but overall , I will reflect on it before accepting if it's true or not .