Well, I have a lot in mind to say here.
With the OP you are hitting at one of the basic tenets of Buddhism, which holds that we suffer because we actively resist things we don’t like and actively crave things we do like.
Example: You stub your toe. You experience pain, which is inevitable.
But say you stub your toe, you experience pain, and you can’t let it go. ‘‘Woe is me!’’ you cry. ‘‘I have stubbed my toe! Oh Og, it hurts so badly! I wish I had not stubbed my toe? Why do I always have to be the one to stub my toe! It is so fundamentally unfair! I can’t be happy if I’m experiencing pain all of the time…’’ etc.
Now you aren’t just experiencing pain, you are perpetuating your own suffering with your active resistance to the inevitability of pain.
Just a little bit of basic observation will reveal to you that people do this all the damned time. We do it with physical pain, with emotional pain, and with potential pain and past pain, and we do it so regularly that we don’t even realize we’re doing it. And for those of us who have serious anxiety or depression issues, these thoughts will nail us into the ground, render us immobile, breed darker, more dangerous thoughts, which then physically depress and/or arouse us more, etc. It is a vicious cycle.
These aren’t really only Buddhist observations. Cognitive Behavioral Therapy, as SpoilerVirgin mentioned upthread, is founded upon the basic principle that people are neurotic because they think unhelpful thoughts and do unhelpful things (this is not in any way meant to be opposed to the notion that people are neurotic because of chemical imbalances… the idea is that thoughts and behavior affect brain chemistry.) The efficacy of CBT is supported by a VAST body of scientific evidence. As someone who has practiced both CBT and Zen Buddhism, they are similar in many key ways.
There is a book by Eckhart Tolle I am currently reading called The Power of Now, which so far is basically Zen Buddhism dressed up in new-agey robes, but I have found it to be really eye-opening for a couple of reasons. In Zen Buddhism, thoughts are regarded as essentially natural phenomenon that are to be neither ignored or indulged in – total, nonjudgmental acceptance of thoughts without buying into them as absolute truth. Metaphors I have seen used for thoughts include drifting clouds, rolling waves, etc. You get the picture – inevitable, natural, impermanent.
But Mr. Tolle looks at thoughts a bit differently – as concrete building blocks, a means to an end, useful only insofar as they help you accomplish things. 90% of thoughts, Tolle counters, are useless and/or destructive, unnecessary. We have a measure of control over what we consciously think, therefore we must learn to separate the wheat from the chaff and banish the chaff.
I have personally found this perspective to be a lot more helpful for my mental health than the Zen Buddhist one. It is essentially the same idea–certainly any Buddhist will acknowledge the useful potential of thinking–but I never heard it quite put that way before. I intend to start a thread in CS once I finish this book to see if anyone else got the same impression from reading this book. In the last two weeks, just thinking about thinking in this way has brought a sense of peace and self-control I’ve never experienced before.
And finally – for me personally, spiritually, a big part of accepting death means accepting the impermanent nature of all things. If you are really into this concept, the problem of death and the root of anxiety, I strongly to advise you read Thich Nhat Hahn’s No Death, No Fear. It is beautifully written, simple, to the point, and has a lot to offer this conversation.