Life begins with the fairest promise, and ends in darkness. It is the unexpected that stuns us. Heredity, environment and temperament lead us into easy calculations of assured repose and strength, and permanency of mental and moral equilibrium. The act of a moment makes sardonic mockery of all our predictions. The whole mentality is not computable. Look searchingly at happiness, and note with sadness that a tear stains her cheek. A dark, sinister thread runs through the web of life.