Their thinking is, in fact, far less a discovery than a re-recognizing, a remembering, a return and a home-coming to a far-off, ancient common-household of the soul, out of which those ideas formerly grew: philosophizing is so far a kind of atavism of the highest order. The wonderful family resemblance of all Indian, Greek, and German philosophizing is easily enough explained. In fact, where there is affinity of language, owing to the common philosophy of grammar—I mean owing to the unconscious domination and guidance of similar grammatical functions—it cannot but be that everything is prepared at the outset for a similar development and succession of philosophical systems, just as the way seems barred against certain other possibilities of world-interpretation.