Quote by Hans Eysenck

"Intelligence is the most important human trait"

"Personality is determined by genetics and environment in equal measure"

"Neuroticism is a predictor of psychological distress"

"The best person is one who scores high on extraversion and low on neuroticism"

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."