According to John Locke, he believes that "we are the same person to the extent that we are conscious of our past and future thoughts and actions in the same way that we are conscious of our present thoughts and actions. Personal identity is not in the brain but is in consciousness." He would argue that "the person awake and sleeping is not the same person, and to punish the person who is awake for what sleeping person thought or did because the person awake was never conscious would be no more right than to punish one twin for what his brother-twin did."
While David Hume believes that these perceptions do not belong to anything. "A man is a bundle or collection of different perceptions." So are we the same person we were five years ago? "Though we've changed in many respects, the same person appears present as was present then."
Do you think there is a blueprint in you?
I think the blueprint, in the case, is more like a philosophy, moral concept, or a belief that one follows throughout his or her life time. I don't think it is relate to the blueprint in terms of DNA, because human change all the time and it is impossible that a person remains the same person (contain the same personality) as when he or she was five years old. I think something that would symbolise a blueprint would be the given identity such as names, family status, knowledge that one belongs in a place, etc. But what if one changes his or her name? I think this can be argue because often, people change their name in order to change something in their life; it could be trying to change a living style, trying to improve oneself and be a better person than was before.
For me, I've changed my surname. It does feel weird at first; as if I wasn't the same person. But then names are just illusion. It's just something made up for humans to be able to relate and be attached to their identity. I think the blueprint would be the 'soul' because when the body disappears, the soul is still the same soul and it still exists.
Do certain things about you stay the same throughout your life? What are these things?
Certain personality stayed the same throughout my life (cheerful, polite, helpful, kind, etc), while other is shaped and changed by time and different situation/scenario I experienced. My DNA is the same one as when I was born (therefore I can't really change my curly hair). I don't remember having the exact same personalities and skills as when I was younger. Memories remain but sometimes may be alter. I think the only thing that doesn't change is one's love for something. I have always love drawing and anything that has to do with crafting and art, and at present I still do.
Is it these things that make you the same person from one time to another?
I think it's difficult to list all the elements that make a person the same person from one time to another. It is most likely DNA, personality, behavior, appearance, and many more elements combined together. But in general, if one changes his or her appearance into something completely different, other people wouldn't be able to recognise the person as the original person anymore. As for personality, if a person changes from conducting bad deeds to good, or good to bad deeds, others would say that "he'd changed" or "she's not the same (insert name) I've known."