In context:
… We refuse to recognize that everything better is purchased at the price of something worse; that, for example, the hope of greater freedom is canceled out by increased enslavement to the state, not to speak of the terrible perils to which the most brilliant discoveries of science expose us. The less we understand of what our fathers and forefathers sought, the less we understand ourselves, and thus we help with all our might to rob the individual of his roots and his guiding instincts, so that he becomes a particle in the mass, ruled only by what Nietzsche called the spirit of gravity.
Reforms by advances, that is, by new methods or gadgets, are of course impressive at first, but in the long run they are dubious and in any case dearly paid for. They by no means increase the contentment or happiness of people on the whole. Mostly, they are deceptive sweetenings of existence, like speedier communications which unpleasantly accelerate the tempo of life and leave us with less time than ever before. Omnis festinatio ex parte diaboli est—all haste is of the devil, as the old masters used to say.