Element: Fire Qualities: Warm and dry Humor: Yellow bile

Personality: Ambitious, leader-like, passionate, easily angered

Behavior: Goal-oriented, confident, aggressive, impatient, not easily discouraged

Modern comparison: Assertive, dominant, sometimes aggressive

Element: Air

Qualities: Warm and moist

Personality: Social, energetic, talkative, lively, optimistic

Behavior: Enjoys people, easily distracted, creative, forgets obligations

Modern comparison: Extroverted and emotionally expressive

Element: Water Qualities: Cold and moist Humor: Phlegm

Personality: Calm, kind, peaceful, reliable

Behavior: Avoids conflict, patient, compassionate, steady, sometimes passive

Modern comparison: Relaxed and agreeable

Element: Earth Qualities: Cold and dry Humor: Black bile

Personality: Thoughtful, introspective, detail-oriented, serious

Behavior: Prone to sadness, perfectionistic, loyal, needs solitude, deep thinker

Modern comparison: Introverted and analytical