Thoughts without content are empty, intuitions without concepts are blind.
A new idea comes suddenly and in a rather intuitive way. But intuition is nothing but the outcome of earlier intellectual experience.
If only these metaphysicians would give their attention to the lengthy discursive processes which lead science to build new intuitions.
The smallest flower is a thought, a life answering to some feature of the Great Whole, of whom they have a persistent intuition.
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.
The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.