1) Clarity 1) Clear-headedness 2) Judgment 3) Rationality 4) Soberness 
• (n.) The quality of being lucid; lucidity.
Lu'cid·ness noun The quality of being lucid; lucidity. 
lucidity, lucidness The quality or condition of being lucid; brightness, luminosity; now chiefly figuratively, intellectual clearness; transparency of thought or expression.