But you yourself are not your body, or your brain, but something else, which we call your soul, your spirit, your life.

And that "you yourself" would remain just the same if it were taken out of your body, and put into the body of a bee, or of a lion, or any other body; or into no body at all.

At least so I believe; and so, I am happy to say, nine hundred and ninety-nine thousand nine hundred and ninety-nine people out of every million have always believed, because they have used their human instincts and their common sense, and have obeyed (without knowing it) the warning of a great and good philosopher called Herder, that "The organ is in no case the power which works by it;" which is as much as to say, that the engine is not the engine-driver, nor the spade the gardener.
There have always been, and always will be, a few people who cannot see that.

They think that a man's soul is part of his body, and that he himself is not one thing, but a great number of things.

They think that his mind and character are only made up of all the thoughts, and feelings, and recollections which have passed through his brain; and that as his brain changes, he himself must change, and become another person, and then another person again, continually.