- Mind Altering ?

Freaky Friday, for example, is a movie/novel centered around a mother and daughter switching bodies into the lives of one another. They face their conflicts in life, their relationships, and allow themselves for a better understanding of one another. In that sense, they keep their own mind, and switch their bodies.
Now what if that was swapped. What if humans possessed the ability to remain in our own bodies, and swap minds with one another; the way they think, make connections, show emotion, even analyse situations. "If you could only imagine what goes on in my head." But to realize the depth of that statement has tied up my mind for days. In order to fully comprehend what is within the mind of someone else, it would virtually eliminate the perspectives of your current mind. Within our own minds, we hold the ability to compare, analyse, and retain information . Once we switch that out for the mind of another, there would be no way to form a conclusion on how the "new mind" would compare to your original because all you have to compare with is the memory of what this "new mind" entails.
As humans, we're constantly finding ourselves in situations where we look at something in a different way than we have in the past, or we remember something from a different perspective than we initially saw it through. Our moods about certain people change, even our likes and interests, or motivations in life. What if all of this was a flaw of switching minds with one another to a certain extent, but as a human race we're unable to fathom the idea. What if mental illness, lets say depression, were to only exist in certain original minds. As one is "cured", said mindset would be transferred from one person to another, leaving an opening for a more positive one to move into its place. What if as people pass, their minds are not put to rest, but rather sent back to the cycle of transferring thought processes.