From my personal viewpoint as well as what I have read and understood, a person is an aggregate of things made up to create this personality one perceives as this person. Sight, sound, feel (touch), smell and taste, all feed information to the mind or thinker. The thinker perceives and feeds back to itself. This constant loop of perception and thoughts flow to create a personality. The personality thinks it is a soul or spirit that should survive death. Buddha has never expounded upon the ideas of reincarnation which were popular in his time and culture. Buddha talked more about anything made of aggregates will one day separate and no longer exist. Change. Time scales may differ for different things. So, this person which is created thru this feedback loop of perceptions and thoughts will die. What is true and real will go on. Neither matter, energy is created nor destroyed. Only transformed. So, that which is real and true will return to continue the cycle of life and death.

The three universal truths of Buddha are Dukkha, Anicca, and Annata. Suffering, Impermanence, and No self. Related to this topic is no self. Look at a car, it is really just a bunch of parts all put together. As it is together, we call it a car. A person is just a bunch of parts all put together to function as a person. The parts create the person. The name of a person is just what we call the owner of the parts. But, the person/owner only exist cause all the parts are functioning together. Once the parts dies, the person/owner no longer exist. So, what is real and true? What continues from this life and goes to the next?