[Nietzsche]

That is a truth within our intellectual meaning, but not an absolute truth. Let's say in another country where they speak a different kind of English (play along) it translates to a different meaning. So therefor it's a truth to us, but still not an absolute truth. Now you may say, "what if the meaning is an absolute truth?", well meaning can not be sent from one person to another directly, we must use language, so meaning can become different. It's all perception. Maybe it shouldn't be "there are no absolute truths", but "we can not comprehend any absolute truths through our limited senses".
Sorry if this is confusing, I don't think I'm explaining it quite right, but trust me they had it worked out more than for us to stop at the phrase contridicting itself.