Jesus said unto him,Verily I say unto thee,That this night, before the cock crow, thou shalt deny me thrice. Peter said unto him,Though Ishould die with thee yet will I not deny thee. Likewise also said all the disciples.

-Bible (NewTestament)
St Matthew 26:34^5.

And the Lord turned, and looked upon Peter. And Peter remembered the word of the Lord, how hehad said unto him,Before the cock crow, thou shalt deny me thrice.

-Bible (NewTestament)
St Luke 22:61.

I can reason down or deny everything, except this perpetual Belly: feed he must and will, and I cannot make him respectable.

-Emerson, RalphWaldo
  Representative Men,'Montaigne; or, The Skeptic'.

Ich musste also das Wissen aufheben, um zum Glauben Platz zu bekommen. I have therefore found it necessary to deny knowledge, in order to make room for faith.

-Kant, Immanuel
  Kritik der reinen Vernunft (Critique of Pure Reason), preface to 2nd edn (translated by N Kemp Smith).

The atrocious crime of being a young man, which [Walpole] has, with such spirit and decency, charged upon me, I shall neither attempt to palliate nor deny; but content myself with wishing that I may be one of those whose follies cease with their youth, and not of those who continue ignorant in spite of their age and experience.

-Pitt,William, 1st Earl of Chatham known as  the Elder
  Speech to the House of Commons, 6 Mar.

A sensitive boy's humiliations may be very good fun for ordinary thick-skinned grown-ups; but to the boy himself theyareso acute, so ignominious, that he cannot confess themöcannot but deny them passionately.

-Shaw, George Bernard
  JohnTanner. Man and Superman, act1.

Who will dare deny that theThird Estate contains within itself all that is needed to constitute a nation?† What would theThird Estate be without theprivileged classes? It would be a whole in itself, and a prosperous one. Nothing can be done without it, and everything would be done far better without the others.

-Sie'  yes
  Qu'est-ce que le tiers-e¤  tat?