Often things realised in thought are more vivid than than the same things in inattentive physical experience. But the things apprehended as mental are always subject to the condition that we come to a stop when we come to explore ever higher grades of complexity in their realised relationships. We always find that we have thought of just this — whatever it may be — and of no more.

— Alfred North Whitehead Science and the Modern World (1925)

More quotes by Alfred North Whitehead

Process and Reality: An Essay in Cosmology (1929)

Adventures of Ideas (1933)

Science and the Modern World (1925)

Adventures of Ideas (1933)

An Introduction to Mathematics (1911)

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