"THE best reason for a revival of philosophy is that unless a man has a philosophy certain horrible things will happen to him. He will be practical; he will be progressive; he will cultivate efficiency; he will trust in evolution; he will do the work that lies nearest; he will devote himself to deeds, not words. Thus struck down by blow after blow of blind stupidity and random fate, he will stagger on to a miserable death with no comfort but a series of catchwords; such as those which I have catalogued above. Those things are simply substitutes for thoughts. In some cases they are the tags and tail-ends of somebody else’s thinking. That means that a man who refuses to have his own philosophy will not even have the advantages of a brute beast, and be left to his own instincts. He will only have the used-up scraps of somebody else’s philosophy; which the beasts do not have to inherit; hence their happiness."
~G.K. Chesterton: The Revival of Philosophy—Why?
Read the complete essay here