Every one has gained a rational knowledge of many different things through experience, through consideration of the individual objects presented to him, but only he who sets himself the task of acquiring a complete knowledge in the abstract of a particular class of objects, strives after science.
baina edozein erako gauzakien ezagutza osoa in abstracto lortzea helburutzat jartzen duena bakarrik ahalegintzen da zientziaren alde.