(noun) (now usually in the plural) Sanity. Example: "He's gone completely out of his wits."
"I speak for those children who cannot speak for themselves, children who have absolutely nothing but their courage and their smiles, their wits and their dreams."
"I would challenge you to a battle of wits, but I see you are unarmed!"
"Brevity is the soul of wit."
"Quotation is a serviceable substitute for wit."
"Words may show a man's wit, actions his meaning."
"Tact: the ability to describe others as they see themselves."
"Wit is educated insolence."
"Wisdom is better than wit, and in the long run will certainly have the laugh on her side."