Immanuel Kant Quotes

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.

Where the senses fail us, reason must step in.

Intuition does not in itself amount to knowledge, yet cannot be disregarded by philosophers and psychologists.

Can the knowledge deriving from reason even begin to compare with knowledge perceptible by sense?

All human knowledge takes the form of interpretation.

Thoughts without content are empty, intuitions without concepts are blind

Human knowledge is dark and uncertain; philosophy is dark, astrology is dark, and geometry is dark.

Scientia is knowledge. It is only in the popular mind that it is equated with facts.

Knowledge is justified belief.

Common Sense is that which judges the things given to it by other senses.

Rightly defined philosophy is simply the love of wisdom.

Our reason arises, at the very least, from this twofold lesson of sensuous revelations and human testimonies.

It can't be Nature, for it is not sense.

Logic is the beginning of wisdom, not the end.

All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, because in no other way can an object be given to us.

All our knowledge has its origins in our perceptions.

Logic is not a body of doctrine, but a mirror-image of the world. Logic is transcendental.

Some like to understand what they believe in. Others like to believe in what they understand.

All human knowledge thus begins with intuitions, proceeds thence to concepts, and ends with ideas.

I do not feel obliged to believe that the same God who has endowed us with senses, reason and intellect has intended us to forego their use and by some other means to give us knowledge which we can attain by them.

Everything is reason. If you don't have reason, you have nothing.

It is by logic we prove. It is by intuition we discover.

It has been said that metaphysics is the finding of bad reasons for what we believe upon instinct.

The psychologists and the metaphysicians wrangle endlessly over the nature of the thinking process in man, but no matter how violently they differ otherwise they all agree that it has little to do with logic and is not much conditioned by overt facts.

Every man feels that perception gives him an invincible belief of the existence of that which he perceives; and that this belief is not the effect of reasoning, but the immediate consequence of perception. When philosophers have wearied themselves and their readers with their speculations upon this subject, they can neither strengthen this belief, nor weaken it; nor can they shew how it is produced. It puts the philosopher and the peasant upon a level; and neither of them can give any other reason for believing his senses, than that he finds it impossible for him to do otherwise.