From I Don't Have Enough Faith To Be An Atheist by Geisler and Turek:
What is Truth?
"Very simply, truth is 'telling it like it is.'
Truth can also be defined as 'that which corresponds to is object' or 'that which describes an actual state of affairs.'
There are Many Truths About Truth. Here are Some of Them:
1. Truth is discovered, not invented. It exists independent of anyone's knowledge of it. (Gravity existed prior to Newton.)
2. Truth is transcultural; if something is true, it is true for all people, in all places, at all times (2+2 = 4 for everyone, everywhere, at every time).
3. Truth is unchanging even though our beliefs about truth change. (When we began to believe the earth was round instead of flat, the truth about the earth didn't change, only our belief about the earth changed.)
4. Beliefs cannot change a fact, no matter how sincerely they are held. (Someone can sincerely believe the world is flat, but that only makes the person sincerely mistaken.)
5. Truth is not affected by the attitude of the one professing it. (An arrogant person does not make the truth he professes false. A humble person does not make the error he professes true.)
6. All truths are absolute truths. Even truths that appear to be relative are absolute. (For example, 'I, Frank Turek, feel warm on November 20, 2003' may appear to be a relative truth, but it is actually absolutely true for everyone, everywhere that Frank Turek had the sensation of warmth on that day.)
In short, contrary beliefs are possible, but contrary truths are not possible. We can believe everything is true, but we cannot make everything true"