What is Truth?

What is truth?
Is truth unchanging law?
We both have truths
Are mine the same as yours?
—Pilate (in Jesus Christ Superstar)

"Tomorrow, after my death, some men may decide to establish Fascism, and the others may be so cowardly or so slack as to let them do so. If so, Fascism will then be the truth of man, and so much the worse for us. In reality, things will be such as men have decided they shall be."
—Jean Paul Sartre (1905-1980)

"When the secret police come, when the torturers violate the innocent, there is nothing to be said to them of the form "There is something within you which you are betraying, Though you embody the practices of a totalitarian society, which will endure forever, there is something beyond those practices which condemns you."
—Richard Rorty (1931- )

"Consider the person who believes, passionately and sincerely, that it is an excellent thing to place millions of Jews in gas chambers. That is certainly "true for him." But can it be allowed to pass unchallenged? Is it equally as true as the belief that one ought to live in peace and tolerance with one's neighbors, including Jews?"
—Alister E. McGrath (1953- )

"Science, by itself, would be a hopelessly limited and impoverished view of things. Music would just be vibrations in air. A beautiful painting would be just a collection of specks of paint of known chemical composition. As part of its technique of enquiry, science ignores questions of value, but this doesn't for a moment mean that values don't exist or that they're not of the highest importance. Nearly all that makes life worth living slips through the wide meshes of the scientific net...I think that I know as certainly as I know anything, that torturing children is wrong, and that love is better than hate. I cannot for a moment suppose that these ethical insights are merely cultural choices of the particular society in which I happen to live."
—John Polkinghorne (1930- )