Beyond Good and Evil by Friedrich Nietzsche Chapter 7 Page 38

intentional injuring of the fundamental will of the spirit, which instinctively aims at appearance and superficiality, — even in every desire for knowledge there is a drop of cruelty.

230. Perhaps what I have said here about a “fundamental will of the spirit” may not be understood without further details; I may be allowed a word of explanation. — That imperious something which is popularly called “the spirit,” wishes to be master internally and externally, and to feel itself master; it has the will of a multiplicity for a simplicity, a binding, taming, imperious, and essentially ruling will. Its requirements and capacities here, are the same as those assigned by physiologists to everything that lives, grows, and multiplies. The power of the spirit to appropriate foreign elements reveals