Science is about knowing; engineering is about doing.

Surveying and engineering were quite close back then.

Successful engineering is all about understanding how things break or fail.

Because they are so humbled by their creations, engineers are naturally conservative in their expectations of technology. They know that the perfect system is the stuff of science fiction, not of engineering fact, and so everything must be treated with respect.

Engineering is achieving function while avoiding failure.

Failure is central to engineering. Every single calculation that an engineer makes is a failure calculation. Successful engineering is all about understanding how things break or fail.