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Logic is the most useful tool of all the arts. Without it no science can be fully known.

— William of Ockham Summa Logicae (1323)

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More quotes by William of Ockham

Plurality is never to be posited without necessity.

It is on account of theology alone that any assertion whatsoever should be called catholic or heretical.

Dialogus (1494)

Plurality ought never be posited without necessity.

It is pointless to do with more what can be done with fewer.

Purely philosophical assertions which do not pertain to theology should not be solemnly condemned or forbidden by anyone, because in connection with such [assertions] anyone at all ought to be free to say freely what pleases him.

Dialogus (1494)

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The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents.

H. P. Lovecraft The Call of Cthulhu (1926)

All religions, arts and sciences are branches of the same tree. All these aspirations are directed toward ennobling man's life, lifting it from the sphere of mere physical existence and leading the individual towards freedom.

Albert Einstein Moral Decay (1937)

Science and religion are two human enterprises sharing many features.

Freeman Dyson Infinite in All Directions (1988)

To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.

Henri Poincaré Science and Hypothesis (1901)

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Quote text and notes from Wikiquote: William of Ockham (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.