That's because only a real artist knows the actual anatomy of the terrible or the physiology of fear - the exact sort of lines and proportions that connect up with latent instincts or hereditary memories of fright, and the proper colour contrasts and lighting effects to stir the dormant sense of strangeness.
Neither spoke, but lat silently listening to the ticking of the clock. A stair creaked, and a squeaky mouse scurried noisily through the wall. The darkness was oppressive, and after lying for some time screwing up his courage, he took the box of matches, and striking one, went downstairs for a candle. At the foot of the stairs the match went out, and he paused to strike another; and at the same moment a knock came so quiet and stealthy as to be scarcely audible, sounded on the front door. The matches fell from his hand and spilled in the passage. He stood motionless, his breath suspended until the knock was repeated. Then he turned and fled swiftly back to his room, and closed the door behind him. A third knock sounded through the house.
But we never get back our youth The pulse of joy that beats in us at twenty becomes sluggish. Our limbs fail, our senses rot. We degenerate into hideous puppets, haunted by the memory of the passions of which we were too much afraid, and the exquisite temptations that we had not the courage to yield to.