Found a few quotes for you in hopes they help boost the PMA. (Didn't want to stick with the song lyrics theme):
"Only a brave person is willing to honestly admit, and fearlessly to face, what a sincere and logical mind discovers." -- Rodan of Alexandria
"A woman of mystique is fully aware of her flaws and weaknesses, yet she is strong enough to admit them and not be embarrassed by them." -- Jean Lush
"It is the highest form of self-respect to admit our errors and mistakes and make amends for them. To make a mistake is only an error in judgment, but to adhere to it when it is discovered shows infirmity of character." -- Dr. Dale E. Turner
"By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest." -- Confucius
"Good people are good because they've come to wisdom through failure." -- William Saroyan