For even if this concept is so complete that it lacks nothing required for thinking of a thing with all of its inner detenninations, still existence has nothing in the least to do with all of this, but only with the question of whether such a thing is given to us in such a way that the perception of it could in any case precede the concept For that the concept precede the perception signifies its mere possibility; but perception, which yields the material for the concept, the sole characteristic of actuality.