Engineer is ruler for change.So engineer has to be static in dynamic system.

Change is that everyone wants at every moment.
But only engineers can bring change for police.
At first,they study control systems(input after processing becomes output giving feedback).
At next,they study power devices(complex).
At last,they study machine design(complex of complex).
At ultimate,they study structural build(simple & sweet truth).
The course of study is first-next-last-ultimate.