"Necessity is The Mother of Invention"

I think that “Necessity is The Mother of Invention” means that when you need something very badly or something is too hard and complicated, you invent something to make it easier, faster and less complicated. One example is how Elias Howe invented the sewing machine to save his mother hours of sewing. It means that we are lazy and we invent machines and other objects that make out life easier. Another example is the telephone. Alexander Graham was often sent to deliver messages by horse or even by foot, as you can imagine, he was too lazy to keep on doing that and he invented the phone. Now he could just ring the person and tell them on the phone. A third example is how Orville and Wilbur invented the first airplane. All of these examples show how people are lazy and so invent objects to make life easier.

image from: http://www.flickr.com/photos/jonburnell/393375462/