To abandon this certainty can leave us with a skeptical paradox that is genuinely depressing.
It suggests in a modern form the perpetual paradox of the Christian life: we are what we are to be.
The paradox of science is that its success in understanding nature has created problems for its understanding of human nature.
He discovered the hydrostatic paradox that the downward pressure of a liquid is independent of the shape of the vessel, and depends only on its height and base.
The position approaches to paradox and is not likely to be generally accepted.
The paradox of predication, that it seems to deny identity, or to deny difference, becomes a pons asinorum.
He was endowed with a strong sense of humour and a love of paradox carried to an extreme.
Aristotle had fallen into the paradox of resolving a mental act into verbal elements.
Paradox, however, soon becomes stale, and fallacy wearisome.
The paradox of Frederick's Crusade is indeed astonishing.
To see the absurdity of the second paradox of relativity is easier than to refute it.
The logic of the last quarter of the 19th century may be said to be animated by a spirit of inquiry, marred by a love of paradox and a corresponding hatred of tradition.
It is indeed the doctrine of the intractability of matter to form that lies at the base of the paradox as to the disparateness of knowledge and the real already noted.
But in the secular world this paradox failed to obtain; there free-will was only too ready to come into conflict with the Church.
"It may seem a paradox," he wrote, "but it is true that the only way for protecting our subjects is to help them to cease to be our subjects."
Herein lies the paradox which is also the deepest truth of our spiritual life.