On page 61 of Buddhism Without Belief Batchelor wrote:
"We spend much of our time either slightly hyper or slightly depressed." It may be a near universal condition.
My mother was a manic depressive (they call it bipolar now, I think); I got most of my genes from her. As a youth my mood swings were profound: moments of ecstatic thought puntuated by long periods of dullness.
A transcendental moment came to me at 23 when my ship put into Santos, Brazil; I met a bunch of really fine, highly cultured young people. Surprisingly they treated me like I was a Hollywood type. (It turned out they were crazy about all Americans. I asked one of the nicest girls why that was; she had a very simple answer: "they're not malicioso.")
I told another one about my mood swings and said that I wished I could even out the mountain top and valley experiences; she said, oh, no; you have to conquer the mountain top.
When we left port, and the excitement ran out, I descended into a grim mood, with traces of free floating anxiety.
Well the mood swings continued for the first half of my life. It wasn't until I left the parish ministry, filling the bishop's appointment to the courts, and I had to show up in an office at 8 every morning, that things changed. The moods began to even out.
Now, at an advanced age I find the transcendent moments returning, and praise God, there's fairly little payback.
Another antidote to mood swings is ageing. At a certain age one can no long afford the excess energy that those high moments bring. One keeps one's cool.
The best antidote is to love: love yourself, love people, love God. When you do that, it makes you feel SO GOOD.
May everyone have that experience-- soon!