The swings are not caused by being bi-polar, they are a relief from always being on the down of life, hence one sale of a book can delight me. If you thinks I am being negative, read all the posts and blogs abiout sales and best sellers and stand in my shoes as somebody who sees one sale as a miraculous thanksgiving.
To paraphrase a joke, which is apt to me:-
A man was walking along the road and met another man bashing his head against wall, "Why are you doing that?" he asked.
The other man replied,"Because it's wonderful when I stop."