Simplicity

While I was reading E.F. Schumacher's Small is Beautiful, a lot of lines jumped out at me, but this one sums up my approach to engineering:

Any third rate engineer or researching can increase complexity; but it takes a certain flair of real insight to make things simple again. – E.F. Schumacher

Striving to attain that ‘certain flair of real insight’ is something I believe all engineers should strive for.