Just consider...Suppose we came to possess a very expensive
object. The minute that thing comes into our possession our mind changes...'Now,
where can I keep it? If I leave it there somebody might steal it'...We worry ourselves
into a state, trying to find a place to keep it. And when did the mind change?
It changed the minute we obtained that object -- suffering arose right then. No
matter where we leave that object we can't relax, so we're left with trouble.
Whether sitting, walking, or lying down, we are lost in worry.
- Ajahn Chah.