"The phrase is correctly written “bear in mind,” though many, many people confuse it with “bare in mind.” The reason for the confusion isn’t very clear, except perhaps that many of us associate “bear” with the ursine mammal, and can’t understand why you would want a “bear” in your mind to represent remembering something.
You can bear a cost, bear a responsibility, bear a child, and bear an emotion. A tree can bear fruit. You can bear yourself with poise, or bear left to change direction."
I know, OT, OT, OT...