Lucretius.
De Rerum Natura.

Deontological Ethics.(deon, duty) Stoic ethics are deontological.

Stoics vs Epicureans.

Physics

• Stoics believe there is a spiritual reality. Logoj. Logical.
• Epicureans are materialists. Atoms.

Epicurean Ethics

• Moderation
• Retirement
• 'hdonh (Hedone) Pleasure
  
• Hedonistic, Hedonism
• Pleasure Good, Pain Bad

How do your choose your philosophy?

• Stick with yours all your life.
• OR can change when appropriate.
• Teenager -- hedonism
• College, then graduate, get a job, get married, kids. Stoicism.
• Retirement. Epicurean

Ovid Metamorphoses

Heraclitus - Everything changes.
4 elements. Leads to the 4 humors.

Fire (hot, dry)	Air (hot, wet)
Earth (cold, dry)	Water (cold, wet)

Midas

Scarcity.
Marginal vs absolute value.

What is the most valuable thing absolutely?

1. Air
2. Water
3. Food