Many of us have used the expression, “Can’t live without it.”  A particular reference may be an exaggeration, but many of us are especially grateful for someone’s inventiveness and ability to create something not thought of before.  Related sayings abound.  “This is the greatest thing since the invention of fire,” or. “…the greatest thing since sliced bread.”  Think about an object that is important to you (like your smart phone, your car’s GPS, a good set of kitchen knives….) Why is this thing especially important to you?