Accepting the impermanence of our existence is surely one of our biggest challenges.
I have sat with people who are very close to the end of their lives. I have almost been able to see their skull, the detailed shapes that remind me of the anatomy and physiology classes I attended years ago. A paper thin layer of skin over their protruding frontal bone, that defined zygomatic bone - the cheek bone - the same bone that made it easy for her to mark out where to apply her rouge, attracting attention to her beautifully shaped face, a fading memory as life fades from her.
It would be too difficult, for me at least, to imagine throwing away all attachment or concern for the day to day turbulence's of life, but to recognise the transience of those events would only be beneficial to me.
The worry and angst of going over and over something in my head removes me from the reality and truth behind the situation. The truth being that life IS a mixture of pain and joy, frustration and contentment, and ultimately we are all here very briefly - so why give so much attention (and energy) to the areas that leave us feeling drained, stressed and exhausted?
Take time every day to give yourself even a minutes break from thinking or mulling over something that is annoying you. Just sit and stare at the flickering light from a candle wick, focus on the colours and the way the flame moves and dances. When a thought leaps into your head, just bring your attention back to the flickering flame. That minute of peace can be enough to remind you that your head (and body) appreciates a break from the relentless mind chatter.
"A lifetime is like a flash of lightening in the sky.
Rushing by, like a torrent down a steep mountain." - Buddha (563 - 483BC)