In learning languages, at first everything is repulsive and burdensome. If one were not encouraged by the hope that, after having accustomed his ear to the unusual sounds and having mastered the strange pronunciation, most delightful ways would be opened up to him, it is doubtful that one would want to enter upon so arduous a path. But when these obstacles are surmounted, how generous is the reward for perseverance in overcoming hardships! New aspects of nature, and a new chain of ideas then present themselves. By acquiring a foreign language we become citizens of the region where it is spoken, we converse with those who lived many thousand years ago, we adopt their ideas; and we unite and co-ordinate the inventions and the thought of all peoples and all times.