That anything exists except myself is unproved and unprovable. All sane men believe that this world not only exists, but matters. Every man believes there is a sort of obligation on us to interest ourselves in this vision or panorama of life. I am aware that an old lady is being murdered down-stairs, but I am going to sleep. That there is any such duty to improve the things we did not make is a thing unproved and unprovable.
All sane men believe that there is such a thing as a self, or ego, which is continuous.
There is no inch of my brain matter the same as it was ten years ago. Surely it might be possible to establish some plain, dull statement such as the above, to make people see where they stand.