Happiness, though an indefinite concept, is the goal of all rational beings
Happiness is not an ideal of reason, but of imagination.
It is never too late to become reasonable and wise.
Of all the arts poetry (which owes its origin almost entirely to genius and will least be guided by precept or example) maintains the first rank.
But only he who, himself enlightened, is not afraid of shadows.
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.