John Piper said this quote
“ Relativism poses as humble by saying: “We are not smart enough to know what the truth is—or if there is any universal truth.” It sounds humble. But look carefully at what is happening. It’s like a servant saying: I am not smart enough to know which person here is my master—or if I even have a master. The result is that I don’t have a master and I can be my own master. That is in reality what happens to relativists: In claiming to be too lowly to know the truth, they exalt themselves as supreme arbiter of what they can think and do. This is not humility. This is the essence of pride. ”