Who am I?

Is there a way to understand completely and thoroughly the nature of me? Of my strengths and weaknesses, gifts of abundance, tendencies to failure? Or must I live in illusions of myself, coming and going like weather patterns, either feeling strong, sensitive, petty, or wrathful? Is it possible to have a complete concept of the person that I am, with its subtleties and contradictions, so that I may have a sense of being a whole, individual, complete person in this world, with tendencies toward both success and failure, illness and health? I believe that spiritual attainment produces consistent personal unity, and that this unity is experienced in meditation.