Blithe and Optimistic

adjective

• Lacking or showing a lack of due concern.
  • usage: "spoke with blithe ignorance of the true situation"
• Carefree and happy and lighthearted.
  • usage: "was loved for her blithe spirit"; "a merry blithesome nature"; "her lighthearted nature"; "trilling songs with a lightsome heart"
  • synonyms: blithesome, lighthearted, lightsome, light-hearted

• Anglo-Saxon: Form of Blythe - joyous
• English: Form of Blythe. Joyous

adjective

• Expecting the best in this best of all possible worlds.
  • usage: "in an optimistic mood"; "optimistic plans"; "took an optimistic view"
• Expecting the best.
  • usage: "an affirmative outlook"
  • synonyms: affirmative

• (a.) Hopeful; sanguine; as, an optimistic view.
• (a.) Of or pertaining to optimism; tending or conforming, to the opinion that all events are ordered for the best.