Experience without theory is blind, but theory without experience is mere intellectual play. – Immanuel Kant
Even philosophers will praise war as ennobling mankind, forgetting the Greek who said: War is bad in that it begets more evil than it kills. – Immanuel Kant
In every department of physical science there is only so much science, properly so-called, as there is mathematics. – Immanuel Kant
Intuition and concepts constitute… the elements of all our knowledge, so that neither concepts without an intuition in some way corresponding to them, nor intuition without concepts, can yield knowledge. – Immanuel Kant