And if you believe the story, this idea comes to him as he's taking a bath, lowering himself in, and he's watching the water level rise and fall.
‫وإذا كنت تصدق القصة،‬ ‫فقد أتته هذه الفكرة وهو يستحم،‬ ‫يغمر نفسه في الماء، وهو يشاهد ‬ ‫ارتفاع وانخفاض مستوى الماء.‬