Science is nothing but trained and organized common sense, differing from the latter only as a veteran may differ from a raw recruit: and its methods differ from those of common sense only as far as the guardsman's cut and thrust differ from the manner in which a savage wields his club.

Common sense is the very antipodes of science.

[O]ne of the great things about science is it forces us to refine our idea of what's common sense. It forces us to have our beliefs conform to the evidence of reality rather than the other way around. The universe may not be like we'd like it to be, but it doesn't really care.

Science is simply common sense at its best, that is, rigidly accurate in observation, and merciless to fallacy in logic.

Common sense is the guy who tells you that you ought to have had your brakes relined last week before you smashed a front end this week. Common sense is the Monday morning quarterback who could have won the ball game if he had been on the team. But he never is. He's high up in the stands with a flask on his hip. Common sense is the little man in a grey suit who never makes a mistake in addition. But it's always someone else's money he's adding up.

No physicist started out impatient with common-sense notions, eager to replace them with some mathematical abstraction that could be understood only by rarified theoretical physics. Instead, they began, as we all do, with comfortable, standard, common-sense notions. The trouble is that Nature does not comply. If we no longer insist on our notions of how Nature ought to behave, but instead stand before Nature with an open and receptive mind, we find that common sense often doesn't work. Why not? Because our notions, both hereditary and learned, of how Nature works were forged in the millions of years our ancestors were hunters and gatherers. In this case common sense is a faithless guide because no hunter-gatherer's life ever depended on understanding time-variable electric and magnetic fields. There were no evolutionary penalties for ignorance of Maxwell's equations. In our time it's different.

Common sense is the best sense I know of

All things considered, science is the best means of understanding almost everything around us. It works well on the human scale and stands as a stark counter-point to beliefs that by their very nature refute the notion of evidence. And I would be the last person to attack people encouraging the rest of us to use our ability to be rational, thereby defending the value and the necessity of science. But I will lift a querying hand when the notion of ‘science’ is held to be immutable, because ‘science’ as such does not exist. Science is a process to be sure, a way of thinking, but what science is above all is that which scientists do, and alas, scientists are people, too. As potentially fallible, irrational, biased, greedy, in short, as flawed, as the rest of us. So, by all means defend science as a process. But don’t confuse it with the very human endeavor of science as a profession. Because they’re not the same thing. And this is why when some guy in a white lab-coat says ‘you can trust me, I’m a scientist,’ best take it with a big bucket of salt, and then say ‘Fine, now show me the evidence and more to the point, show me how you got to it.

In contrast to logic, there is common sense, or still better, the Spirit of Reasonableness.

Common sense (which, in truth, is very uncommon) is the best sense I know of: abide by it; it will counsel you best.

Common sense is wisdom, and wisdom is different from knowledge. You are wise when you no longer act against yourself. You are wise when you live in harmony with yourself, with your own kind, with all of creation.

If we no longer insist on our notions of how Nature ought to behave, but instead stand before Nature with an open and receptive mind, we find that common sense often doesn't work. Why not? Because our notions, both hereditary and learned, of how Nature works were forged in the millions of years our ancestors were hunters and gatherers. In this case common sense is a faithless guide because no hunter-gatherer's life ever depended on understanding time-variable electric and magnetic fields. There were no evolutionary penalties for ignorance of Maxwell's equations. In our time it's different.

There are two things in the world that can never get on together—religion and common sense. Religion deals with the next life, common sense with this; religion points to the sky, common sense to the earth; religion is all imagination, common sense all reason; religion deals with what nobody can understand, common sense with what everybody can understand; religion gives us no return for our investments but flash notes on the bank of expectation, common sense gives us good interest and full security for our capital. They are as opposite as two things can possibly be, and they are always at strife. Religion is always trying to fill the world with delusions, and common sense is always trying to drive them away. Religion says Live for the next world, and common sense says Live for this.

Common sense says go home and forget it, no money coming in. Common sense always speaks too late. Common sense is the guy who tells you you ought to have had your brakes relined last week before you smashed a front end this week. Common sense is the Monday morning quarterback who could have won the ball game if he had been on the team. But he never is. He's high up in the stands with a flask on his hip. Common sense is the little man in a gray suit who never makes a mistake in addition. But it's always somebody else's money he's adding up