To be is to be the value of a variable.

Philosophers
Willard Van Orman Quine
American logician (1908-2000), Harvard's Edgar Pierce Professor 1956-1978. Two Dogmas of Empiricism dismantled the analytic-synthetic split; Word and Object launched the indeterminacy of translation and naturalism.
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Willard Van Orman Quine's Other Quotes
Related Quotes
All things are in all things, but in each in the way that suits its own nature.
-- Porphyry
Everything perfect proceeds outward from its own perfection.
-- Proclus
All things flow.
-- Heraclitus
For Being is, and non-Being is not.
-- Parmenides
To study the Way is to study the self. To study the self is to forget the self. To forget the self is to be enlightened by the ten thousand things.
-- Dōgen
For whom emptiness works, everything works. For whom emptiness does not work, nothing works.
-- Nagarjuna