Duke Frederick is ambitious, aggressive, despotic, materialistic, and unscrupulous. Duke Senior is virtually the opposite in character. He may have been more like Duke Frederick at one time, but his reversal of fortune and the mysteriously benign influence of the Forest of Arden have mellowed him. He has become a philosopher, not unlike the American naturalist Henry David Thoreau, author of Walden. Duke Senior has learned to value simplicity, freedom from stress, and love of nature. He expresses his values in the soliloquy which contains the famous line "Sweet are the uses of adversity." Having been usurped by his cunning and ruthless brother, Duke Senior has learned to enjoy the simple pleasures of life and to despise the false material values of the court life he has left behind him.