"The picture of man as a being who, thanks to his reason, can rise above the values of his civilisation, in order to judge it from the outside, or from a higher point of view, is an illusion. It simply must be understood that reason itself is part of civilisation. … [S]udden complete reconstruction of the whole is not possible at any stage of the process, because we must always use the material that is available, and which itself is the integrated product of a process of evolution."