QUOTATION: Lying is Not Useful

Now every man who lies commits an injustice; and if any man thinks that a lie is ever useful, he must think that injustice is sometimes useful. For no liar keeps faith in the matter about which he lies. He wishes, of course, that the man to whom he lies should place confidence in him; and yet he betrays his confidence by lying to him. Now every man who breaks faith is unjust. Either, then, injustice is sometimes useful (which is impossible), or a lie is never useful

--St. Augustine, On Christian Doctrine, Book I, Chapter 36

QUOTATION: Lying

Nothing is more unworthy of a Christian, whose life should be an imitation of God who is the soul of Honor and Truth itself, than to think one thing and say another.

--St Jean Vianney, the Curé of Ars

QUOTATION: Lying

Of lies are many sorts, which indeed all, universally, we ought to hate. For there is no lie that is not contrary to truth. For, as light and darkness, piety and impiety, justice and iniquity, sin and right-doing, health and weakness, life and death, so are truth and a lie contrary the one to the other. Whence by how much we love the former, by so much ought we to hate the latter.

--St. Augustine, To Consentius, Against Lying

QUOTATION: Lying

It is not lawful to tell a lie in order to deliver another from any danger whatever.

--St. Thomas Aquinas, Summa Theologica

QUOTATION: Lies

He who says that some lies are just, must be judged to say no other than that some sins are just, and therefore some things are just which are unjust: than which which what can be more absurd?

--St. Augustine, Against Lying