Need help with a riddle please! high IQ probably will help!?

its the clic 2 identical guards riddle, one of them always lies, and the other always tells the truth, you can only ask one question to one of them, what is the question, i thought the question to ask was " would the other guard say that you are guarding the door to enlightenment? (ya the guards are guarding 2 doors either to enlightenment or eternal suffering) but that doesnt seem to make sense because if the guard you ask replies "no" then that would mean that the other guard would not say that hes guarding the right door, meaning that the other 1 is the liar because he would mis-lead you about who is guarding it. or if he replied "yes" that would mean that yes, the guard you asked is the one guarding the right door, the riddle doesnt imply that the truthful guard is guarding the right door, thats very key in asking and finding out who it is, but society gives meaning to truthfulness and lieing, like right and wrong, so we ociate the truth with being good, and in this case the other good thing would be enlightenment vs. eternal suffering, so that doesnt nessessarily mean that the truth guard is guarding the right door, but we ume that because we ociate the 2 things together, SOOO.... my questions are , what is the right question to ask AND is the truth guard guarding the door to enlightenment, i dont think anyone has ever asked that before, have they?