simple is complex (and complex is still complex)

Came across an Albert Einstein quote today: " Everything should be made as simple as possible, but not simpler"

Being an engineer, in my professional career, many times I have come across what I would call "complexity traps". These are spots in a project which generally prove to be the most tasty, the most pleasant parts. Especially in the cases where creativity needs to be involved, an engineer tends to turn the quest for a solution into a Sunday puzzle. The solution gets more and more perfect but also more and more difficult to implement to the degree that sometimes it is not implementable anymore or even worse to the degree that it is implementable but becomes very difficult to maintain afterwards as no one else fully comprehends what the solution is all about. Just like the above sentence.

But this certainly doesn't mean that achieving simplicity when dealing with complex issues is simple. Neither it is about leaving things at a primitive level. The brilliance of simplicity becomes only evident if the mind behind it is fully aware of the complexities of the matter. So simplicity can only be permanent if it is derived from complex thought. Like Eric Satie's or Phillip Glass' music for example or like in e=mc2.