Experience without theory is blind, but theory without experience is mere intellectual play. – Immanuel Kant
Morality is not the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness. – 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
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