Not only does "orthodox" no longer mean being right, it practically means being wrong. --G. K. Chesterton, 1905
We cannot be passive and silent towards those who reject God's Word and our holy faith.-- Abraham Kuyper, Confidentie, p72.
Do not bury our glorious orthodoxy in the treacherous pit of a spurious conservatism.
Abraham Kuyper, Sermon, Conservatism and Orthodoxy, Utrecht, 31 July 1870, in Abraham Kuyper a Biography, Fank Vanden Berg, Paideia Press, 1978.p 49.
After listening to modern tirades against the great creeds of the Church, one receives a shock when one turns to the Westminster Confession... and discovers that in doing so one has turned from shallow modern phrases to a "dead orthodoxy" that is pulsating with life in every word. In such orthodoxy there is life enough to set the whole world aglow with Christian love. --J. Gresham Machen, 1923.
[Leaders of the anarchist movement in Amsterdam] call their public demonstrations "Happenings". These paintings, these poems, and these demonstrations... are the expression of men who are struggling with their appalling lostness. Dare we laugh at such things? Dare we feel superior when we view their tortured expressions in their art? Christians should stop laughing and take such men seriously. Then we shall have the right to speak again to our generation. These men are dying while they live, yet where is our compassion for them? There is nothing more ugly than an orthodoxy without understanding or without compassion. ... Francis A. Schaeffer, The God who is There 
Othodoxy is my doxy; heterodoxy is another man's doxy. William Warburton (1698 - 1779)