Historian Michael Licona says a number of scholars have also criticized historical Jesus research for a "secular bias that ...often goes unrecognized to the extent such beliefs are ...considered to be undeniable truths." New Testament scholar Scot McKnight notes that bias is a universal criticism: "everyone tends to lean toward their own belief system" though historian Michael Grant notes that within life of Jesus studies the "notorious problem reaches its height." Licona adds that because "there is no such thing as an unbiased reader/author," and that every scholar of the historical Jesus "brings philosophical baggage," and because there are no "impartial historians," and "only the naive maintain that historians who are agnostics, atheists and non-Christian theists... without any biases," this is a criticism inevitably accurate to varying degrees for everyone in the field. Stephen Porter says "We are all very biased observers, and given how biased we are, it is no wonder that our criteria so often give us what we want."