I agree with the other person - pride is something that Hrothgar cautions Beowulf against. Excessive pride (also known as hubris in Anglo-Saxon poetry) is not a desirable characteristic that a leader/warrior should have because it will lead them to their demise in the end. This is what happened to Beowulf ultimately - he thought he could defeat the dragon in his old age because of his hubris, and because of it, he died.
In paragraph 2, the role of cynicism and idealism in Fulghum’s Credo-writing process is naive, but the whole credo of idealism has sense and over the years has grown into cynicism.