He loved enterprise, hardship and even danger, for its own sake.
Frankenstein describes Clerval as a boy. Clerval shares Frankenstein’s central personality trait: ambition. Both men are drawn to danger and hardship, in a spirit of adventure. Frankenstein says that Clerval is his dearest friend, which shows that as well as being ambitious himself, Frankenstein admires ambition in other people.
Excellent friend! How sincerely you did love me, and endeavor to elevate my mind until it was on a level with your own!
Frankenstein praises Clerval for being such a good friend. Several times in the novel, Clerval rescues Frankenstein from despair. It is Clerval who nurses Frankenstein back to health after the Monster’s creation. This demonstrates the value of friends and companions, underlining the pain of the Monster’s loneliness.