“He who thinks little errs much…”

“Experience does not err; only your judgments err by expecting from her what is not in her power.”

“All our knowledge hast its origins in our perceptions … In nature there is no effect without a cause … Experience never errs; it is only your judgments that err by promising themselves effects such as are not caused by your experiments … Science is the observation of things possible, whether present or past; prescience is the knowledge of things which may come to pass.”

“Man has much power of discourse which for the most part is vain and false; animals have but little, but it is useful and true, and a small truth is better than a great lie.”

“The painter will produce pictures of little merit if he takes the works of others as his standard.”

“He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.”

“He who can copy can do.”