One of most uncommon things in this world seems to be Common Sense. What is supposed to be simple, is made complex by our thoughts, dogma, beliefs and prejudices. Many have shared their thoughts, as quoted below.

There are 40 kinds of lunacy, but only one kind of common sense. - African proverb.

Courage without common-sense is like a ship without a compass. - from Wisdom.

Common sense is the knack of seeing things as they are, and doing things as they ought to be done. - C E Slowe.

Not all of us have to possess earth-shaking talent. Just common sense and love will do. - Myrtle Auvil.