In the first book we were reluctantly driven to explain the human body as merely idea of the subject which knows it, like all the other objects of this world of perception. But it has now become clear that what enables us consciously to distinguish our own body from all other objects which in other respects are precisely the same, is that our body appears in consciousness in quite another way toto genere different from idea, and this we denote by the word will;
Baldin eta lehen liburuan barneko kontrakarrarekin soin propioa mundu begiesgarri honetako gainerako objektu guztiak bezala subjektu ezagutzailearen errepresentazio soil gisa azaldu badugu;