Protestants do you feel you have objective cerititude or only subjective certititude?
They are, "...ever learning yet never attaining knowledge of the truth (2Timothy 3:7)."
Objective certitude means that the mind conforms to objective truth. The person with objective certitude is certain of the truth because it is the truth. The person with subjective certitude is motivated by their feelings whether they are of truth or not. Those who are locked into subjective certitude are only fooling themselves into thinking that they are right simply because they are sincere in their beliefs. However, sincerity is a two edged sword and can be misleading, simply because a person can be sincerely wrong as well.
How are those with subjective certitude, resulting in closed minds, ever going to be able to even find the truth?
The answer to that one is that they will not ever find the truth unless they open their minds.