Leibnizian optimism
Pollyannaism
blitheness
blithesomeness
bright outlook
bright side
brightness
buoyancy
cheer
cheerful expectation
cheerfulness
cheeriness
cheery vein
eupeptic mien
geniality
gladness
gladsomeness
good cheer
happiness
hope
hopefulness
idealism
millennialism
optimisticalness
perfectibilism
perfectionism
philosophical optimism
pleasantness
positivism
radiance
rosy expectation
rosy outlook
sanguine expectation
sanguine humor
sanguineness
sanguinity
silver lining
sunniness
utopianism
winsomeness
disposition
temperament
confidence
contentment
curiosity
determination
devotion
enthusiasm
frankness
gaiety
generosity
humor
self-confidence
vitality
pessimism