Whenever you advise a ruler in the way of Tao,
Counsel him not to use force to conquer the universe.
For this would only cause resistance.
Thorn bushes spring up wherever the army has passed.
Lean years follow in the wake of a great war.
Just do what needs to be done.
Never take advantage of power.
But never glory in them.
But never boast.
But never be proud.
Because this is the natural way.
But not through violence.
Force is followed by loss of strength.
This is not the way of Tao.
That which goes against the Tao comes to an early end.
– Taken from here