Perception is not determined simply by stimulus patterns; rather it is a dynamic searching for the best interpretation of the available data.

The world is not run from where he thinks. Not from castle walls, but from countinghouses, not by the call of the bugle but by the click of the abacus, not by the grate and click of the broadsword but by the scrape of the pen.

正是依靠观察和思考才能找到方法。所以我们必须不断挖掘和钻研。