I used to have an insuperable fear of growing old, becoming weak, having my arteries harden, losing teeth, becoming impotent, dying etc. but now I see that all of it (save maybe dying) is essentially optional. That sudden epiphany has really changed my life. I do however feel worse for those who are afflicted with some number of the above because I see now how preventable it is. Oh well.
Now we just need to figure out which dietary deficiency is at the root (so to speak) of baldness.
I definitely have less anxiety in my life in general, and I suspect that anxiety often comes out of a generally stressed-out body, and it tends to find some kind of object to attach itself to in the mind (to engage in some armchair pop-pschology). Basically, people are stressed out because they're unhealthy, and they find something to be stressed out about after the fact.
This was something I've always suspected to be true, but my experience with paleo really has strengthened this notion to me. If you have s**t on your mind, get yourself healthy and it will probably bother you a lot less.
My dad is 70 and his mind is as good as it ever was, but his hips, knees, and ankles are shot, plus my mom had both her knees replaced. That's what I worry about, along with being finically able to live long.