No power and no treasure can outweigh the extension of our knowledge.
One should practice much sense, not much learning.
Beautiful objects are wrought by study through effort, but ugly things are reaped automatically without toil.
Poverty in a democracy is as much to be preferred to what is called prosperity under despots, as freedom is to slavery.
Many much-learned men have no intelligence.
Sweet exists by convention, bitter by convention, color by convention; but in reality atoms and the void alone exist