What Am I?

Who and what am I now? Am I the sum of my life or only of the past months?

from ‘Flowers for Algernon’ by Daniel Keyes.

What truly defines one’s character? I am a different person to different people around me. Each one knows me as a certain person by judging and experiencing the fragment of time they have spent with me. Only I know the true me, the one who has spent a lifetime with my real self. Does that make a person’s character a constant or a variable based on everyone’s perspective?