Philosophy can never do more than interpret and explain what is given. It can only bring to distinct abstract knowledge of the reason the nature of the world which in the concrete, that is, as feeling, expresses itself comprehensibly to every one. This, however, it does in every possible reference and from every point of view. Now, as this attempt has been made from other points of view in the three preceding books with the generality that is proper to philosophy, in this book the action of men will be considered in the same way; and this side of the world might, indeed, be considered the most important of all, not only subjectively, as I remarked above, but also objectively. In considering it I shall faithfully adhere to the method I have hitherto followed, and shall support myself by presupposing all that has already been advanced. There is, indeed, just one thought which forms the content of this whole work. I have endeavoured to work it out in all other spheres, and I shall now do so with regard to human action. I shall then have done all that is in my power to communicate it as fully as possible.