He pondered deeply, like diving into a deep wa­ter he let him­self sink down to the ground of the sen­sa­tion, down to the place where the causes lie, be­cause to identify the causes, so it seemed to him, is the very es­sence of think­ing, and by this alone sen­sa­tions turn into real­iz­a­tions and are not lost, but be­come en­tit­ies and start to emit like rays of light what is in­side of them