Optimism

optimism
ˈɒptɪmɪz(ə)m/
noun
noun: optimism
  1. 1.
    hopefulness and confidence about the future or the success of something.
    “the talks had been amicable and there were grounds for optimism”
    synonyms: hopefulness, hope, confidence, buoyancy,cheer, good cheer, cheerfulness,sanguineness, positiveness, positive attitude

    “such statements reflect the growing optimism among members of the profession”
    antonyms: pessimism
  2. 2.
    PHILOSOPHY
    the doctrine, especially as set forth by Leibniz, that this world is the best of all possible worlds.
    • the belief that good must ultimately prevail over evil in the universe.