If you can’t explain it simply, you don’t understand it well enough. (Albert Einstein)

Making the simple complicated is commonplace. Making the complicated simple, awesomely simple, that’s creativity. (Charles Mingus)

Kelly Johnson – an aeronautical engineer in the 1950s and 60s – is credited with creating the acronym KISS – Keep It Simple Stupid. 

Contrary to some interpretations of the KISS principle, it is not at all about suggesting that people are stupid. It is about simplicity and how simplicity is more functional and useful than complication.

It is said of Johnson that he would give his design engineers a handful of tools and challenge them to design jet aircraft.  These planes had to be simple enough to be repaired by the average mechanic, in combat conditions, using only these tools.

Antoine de Saint-Exupéry, a pilot and the author of The Little Prince – one of the simplest and most profound books ever written – said it best when he said,

It seems that perfection is reached not when there is nothing left to add, but when there is nothing left to take away.