"Intuition and concepts constitute... the elements of..." - Quote by Immanuel Kant

“A society that is not willing to demand a life of somebody who has taken somebody else’s life is simply immoral.”

“Human reason has the peculiar fate in one species of its cognitions that it is burdened with questions which it cannot dismiss, since they are given to it as problems by the nature of reason itself, but which it also cannot answer, since they transcend every capacity of human reason.”

“[R]eason is... given to us as a practical faculty, that is, as one that influences the will.”

“Even things that are true can be proved.”

“To know, is to know that you know nothing. That is the meaning of true knowledge.”

“It must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are 'close to experience,' and greater confidence in such a theory is certainly justified. There is less danger of going completely astray, particularly since it takes so much less time and effort to disprove such theories by experience. Yet more and more, as the depth of our knowledge increases, we must give up this advantage in our quest for logical simplicity in the foundations of physical theory.”

“Sometimes what my analytical mind says to me is not what I'll do.”

“On this path let the heart be your guide.”

“How to feel your way toward something honest, hidden under the trapdoor on the top of your skull.”