Which is Really You, the Finger or the Thumb?

Observe the stages of this differentiation, the levels of abstraction: First, the organism from its environment, and with this knowledge of the environment. Second, the distinction of knowing knowledge from knowledge itself. But in concrete fact all this, like the fingerthumb opposition, is a difference which does not divide. The thumb is not floating in the air alongside the rest of the hand. At their roots both fingers and thumb are joined. And at our roots we are joined to the whole subject of nature. Of course, you might say that nature or the whole universe is nothing but a big abstraction. But tell me, is an orange nothing but an abstraction from its component molecules, skins, segments, fibers and fluids?