As President Barack Obama prepares to accept his Nobel Peace Prize on Thursday, he is well-aware that he has not yet achieved the same standing as previous winners, press secretary Robert Gibbs said Wednesday.

Gibbs suggested the president will be humble about the award when he delivers a speech at the acceptance ceremony Thursday in Norway.

"The president understands and again will also recognize that he doesn't belong in the same discussion as Mandela and Mother Teresa," Gibbs said today.

Many have pointed to the irony of Obama accepting the Nobel as he escalates the war in Afghanistan. Gibbs said that fact is not lost on the president.

"The president will address the notion that last week he authorized a 30,000-person increase in our commitment to Afghanistan, and this week accepts a prize for peace," he said.