Nature a, (ce crains-je) elle mesme attaché à l'homme quelque instinct à l'inhumanité

To philosophize is to doubt

Learned we may be with another man's learning: we can only be wise with wisdom of our own.

Did I know myself less, I might perhaps venture to handle something or other to the bottom, and to be deceived in my own inability; but sprinkling here one word and there another, patterns cut from several
pieces and scattered without design and without engaging myself too far, I am not responsible for them, or obliged to keep close to my subject, without varying at my own liberty and pleasure, and giving up myself to doubt and uncertainty, and to my
own governing method, ignorance.

Demetrius the grammarian finding in the temple of Delphos a knot of philosophers set chatting together, said to them, “Either I am much deceived,
or by your cheerful and pleasant countenances, you are engaged in no very deep discourse.” To which one of them, Heracleon the Megarean, replied: “ ’Tis for such as are puzzled about inquiring whether the future tense of the verb Ballo be spelt with a
double L, or that hunt after the derivation of the comparatives Cheirou and Beltiou, and the superlatives Cheiriotou and Beliotou, to knit their brows whilst discoursing of their science; but as to philosophical discourses, they always divert and cheer up those that entertain them, and never deject them or make them sad.