I really enjoy this metaphor and I heard it a long time ago.  It resonated with me and has stuck with me for years.  Sometimes it is easy to forget the most simple lessons.  Not being aware or not understanding the consequence of our surroundings can be dangerous to our mind and body.

Please check out our sponsor!
www.wheelchairbearings.com
Bearings from wheelchairbearings.com are made specifically for wheelchair wheels.  Get more performance out of your chair.  The simple and fast way to feel the difference between old and new bearings, not to mention the feeling of working on your own equipment.
Listeners of the show get 10% off bearings and tool.  Enter twistedspine10 at checkout!

Support the show (https://www.patreon.com/twistedspine)