Those who state that man cannot issue an absolute truth are themselves trying to profess an absolute truth, thus they are automaticaly invalidating their own words, as that premise is obviously impossible and untrue.
"A half-truth is a whole lie."
"The truth shall set you free."
"In the end, more than freedom, they wanted security. They wanted a comfortable life, and they lost it all -- security, comfort, and freedom. When the Athenians finally wanted not to give to society but for society to give to them, when the freedom they wished for most was freedom from responsibility, then Athens ceased to be free and was never free again."
DO YOU REALLY WANT TO BE FREE?