But although all our knowledge begins with experience, it does not follow that it arises from experience. – Immanuel Kant
He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals. – Immanuel Kant
Two things fill the heart with renewed and increasing awe and reverence the more often and the more steadily that they are meditated on: the starry skies above me and the moral law inside me. – Immanuel Kant
In every department of physical science there is only so much science, properly so-called, as there is mathematics. – Immanuel Kant