Albert remained entirely indifferent to the well-intentioned persuasion of the others. Having already made up his decision, he had no intention of changing his mind at the last minute.
If he did not face this with a mindset of giving his all, he might as well give up now; the slightest hesitation would only add an extra layer of risk to his duel with Voldemort.
In truth, if not for various reasons, Albert would have very much liked to let Professor Dumbledore take his place in dueling Voldemort—that certainly would have been quite interesting.
Chapter 915