"Jesus answered: My kingdom is not of this world. If my kingdom were of this world, my servants would certainly strive that I should not be delivered to the Jews: but now my kingdom is not from hence. Pilate therefore said to him: Art thou a king then? Jesus answered: Thou sayest that I am a king. For this was I born, and for this came I into the world; that I should give testimony to the truth. Every one that is of the truth, heareth my voice. Pilate saith to him: What is truth? And when he said this, he went out again to the Jews, and saith to them: I find no cause in him" (John 18:36-38).
As a general rule, heresy involves taken a single true doctrine or set of true doctrines and either rejecting them or overemphasizing them to the detriment of all other doctrines. Today's heresy, however, is not a heresy in the proper and particular sense, but rather is a type of attitude which lends itself to heresy, and indeed is a more vague kind of heresy. In fact, in a certain sense, it is an attitude adopted along with certain other attitudes or heresies, upon whose shoulders it stands. Cynicism might be described as the combinations of modernity (and post-modernity), moral relativism, and iconoclasm with a decided--indeed even and intentional--lack of charity.
Read the rest on the Nicene Guys site.