Human beings live in a state of mind called 'sanity' on a small planet in space.
If they think about time, they find it inconceivable that it had a beginning. It is also inconceivable that it did not have a beginning. Thoughts of this kind are not disturbing to 'sanity', which is obviously a remarkable phenomenon and deserving more recognition. Now sanity possesses a constellation of defining characteristics which are at first sight unrelated. In this it resembles other, more widely accepted, psychological syndromes.