Imagine you’ve just come home from work. You sit down and relax, not in any elated or distressed state of mind. The state of awareness you are in—the emotional state you return to and have returned to all your life—can exist in a future life. That calm state is who you are from a point of view of awareness. I refer to this as baseline awareness.
Don’t confuse this with an object. If I throw a bowling ball into a volcano it’s gone for good. I can make one just like it but I won’t have the same one ever again. This is the way it is with objects, but processes are different. I can sing the same song again and again, because a song is a process. Awareness is also a patterned process in the brain. But it is probably not unique. The same parts of the brain light up for anger or sadness in everyone. Your baseline awareness—the awareness you return to after a heated moment—is probably something that is common to many other people. Who’s to say it can’t exist again?
So, if a baby born today has the same baseline awareness as a baby from 1,000 years ago the baby born today is a reincarnation of the baby from 1,000 years ago.