Absolute Truth?

Do you believe in absolute truth? Or do you think that different people can have different versions of the truth, and all be right (that truth is relative)?

A lot of people seem to believe that truth is relative. I have to disagree with them because if that's true (pun intended), I don't see how we can know anything.

A friend emailed me and put it in a way I hadn't considered: if it is OK to believe anything (or many things), why does the Bible warn against false teaching?

Think about that - wouldn't "false teaching" imply that some things are true/right and some things are false/wrong? That there is a standard somewhere by which all teachings will be judged to be right or wrong?

"...and you will know the truth, and the truth will set you free." - John 8:32, ESV

If "the truth" exists as Jesus said it does, does that mean that it is right and something else is wrong? What could Jesus have meant by this:

"For false christs and false prophets will arise and perform great signs and wonders, so as to lead astray, if possible, even the elect. - Matthew 24:24, ESV

Unless there is such a thing as falsehood, and false teachings, how could I be led astray? Wouldn't anything I believe be the truth for me? I've had many people assert this very thing to me, but I just can't see how it is possible. What would a false christ/prophet say that would be wrong? Wouldn't that just be his own truth?