So a military force has no constant formation, water has no constant shape: the ability to gain victory by changing and adapting according to the opponent is called genius.
She let him come further, his lips came and surging, surging, soft, oh soft, yet on, like the powerful surge of water, irresistible, till with a little blind cry, she broke away.
There are many mysteries in old age but the greatest, surely, is this: in those adverts for walk-in bathtubs, why doesn't all the water gush out when you get in?