Common sense is not so common.

• Anything too stupid to be said is sung.
• He is a hard man who is only just and a sad one who is only wise.
• Use, do not abuse; neither abstinence nor excess ever renders man happy.
• Judge of a man by his questions rather than by his answers.
• I may disagree with what you have to say, but I shall defend to the death your right to say it.
• The secret of being boring is to say everything.
• If God did not exist, it would be necessary to invent Him.
• God is a comedian playing to an audience too afraid to laugh.
• The way to become boring is to say everything.
• Those who can make you believe absurdities can make you commit atrocities.