Common sense is very uncommon.
No Ghost of any common sense begins a conversation
We can't avoid reasoning; we can only avoid doing it well.
... always an honest man, often a wise one, but sometimes ... absolutely out of his senses.
Referring to John Adams with whom he did not always get along:
... common sense is very rare.
A wise person decides slowly but abides by these decisions.
Next to sound judgment, diamonds and pearls are the rarest things in the world.
The most important human endeavor is the striving for morality in our actions. Our inner balance and even our very existence depend on it. Only morality in our actions can give beauty and dignity to life. To make this a living force and bring it to clear consciousness is perhaps the foremost task of education. The foundation of morality should not be made dependent on myth nor tied to any authority lest doubt about the myth or about the legitimacy of the authority imperil the foundation of sound judgment and action.
Common sense in an uncommon degree is what the world calls wisdom.
Knowing what is right does not make a sagacious man.
Talk sense to a fool and he calls you foolish.
No, it's a Bb. It looks wrong and it sounds wrong, but it's right.
I like a woman with a head on her shoulders. I hate necks.
I do not live on false promises. I cannot afford to live on bad advice.
Good advice is rarer than rubies.
Common sense is genius dressed in its working clothes.
Reason must be our last judge and guide in everything.
It is a characteristic of wisdom not to do desperate things.
Good men make good decisions.
The most uncommon form of intelligence is common sense.
Intelligence divorced from judgment produces nothing but foolishness.
To avoid the various foolish opinions to which mankind are prone, no superhuman genius is required. A few simple rules will keep you, not from all error, but from silly error.
There is nothing more uncommon than common sense.
History teaches us that a given view has been abandoned in favor of another by all men, or by all competent men, or perhaps by only the most vocal men; it does not teach us whether the change was sound or whether the rejected view deserved to be rejected.
We can be or become wise in all matters of secondary importance, but we have to be resigned to utter ignorance in the most important respect: we cannot have any knowledge regarding the ultimate principles of our choices, i.e. regarding their soundness or unsoundness... We are then in the position of beings who are sane and sober when engaged in trivial business and who gamble like madmen when confronted with serious issues.