I am known for learning from art rather than learning from businesses and business people.
In his beautiful, free and highly recommended Oxford University iTunes U course The Elements of Drawing, Stephen Farthing introduces the viewer into the basic concepts of observing and drawing, and makes a very important point.
The rubber is a creative tool.
Probably obvious for some, I find this reminder refreshing. It reminds me to look for more than one purpose in every thing. A threat might be an opportunity. An opportunity might be a trap.
Reminding oneself to look at the world in layers and shades increases the number of opportunities and reduces danger, providing safety.