Common sense is the foundation of all authorities, of the laws themselves, and of their construction.

I can never fear that things will go far wrong where common sense has fair play.

If the obstacles of bigotry and priestcraft can be surmounted, we may hope that common sense will suffice to do everything else

When philosophers use a word—'knowledge,' 'being,' 'object,' 'I,' 'proposition,' 'name,' and try to grasp the essence of the thing, one must always ask oneself; is the word ever actually used in this way in the language-game which is its original home?...What we do is to bring words back from their metaphysical to their everyday use.

A long habit of not thinking a thing wrong, gives it a superficial appearance of being right, and raises at first a formidable outcry in defense of custom. But the tumult soon subsides. Time makes more converts than reason.

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 manne