You can't have it both ways

C.S. Lewis in his book, The Abolition of Man attacks the notion that there can be no such thing at universal norms. For example, some would say that we can't claim to have any real knowledge of universal truth, we can only state our feelings. In response to this C.S. Lewis says,

And all the time-such tragi-comedy of our situation-we continue to clamour for those very qualities we are rendering impossible. You can hardly open a periodical without coming across the statement that what our civilization needs is more "drive", or dynamism, or self-sacrifice, or "creativity". In a sort of ghastly simplicity we remove the organ and demand the function. We make men without chests and expect of them virtue and enterprise. We laugh at honour and are shocked to find traitors in our midst. We castrate and bid the geldings be fruitful.