Lines 1 and 2: Muchmuch of what's considerateconsidered madness is actually the most profound kind of sanity. That's, but not when it is viewed by someone is sensedwho has "sense." And lines 3 and 4: Whatwhat is couldconsidered to be sense is in fact madness. It's the societySociety, not reason how define, defines sense and madness. lastLast 4 lines: when you agree with the society, you are sensitized. When you disagree this, you are mad and dangerous and youyour freedom in thinkingof thought will be handled with a chain.