“It is worse still to be ignorant of your ignorance.”

“No. Never. I have to try my best or I'll become worse and worse. Even if I can't make up with them. Even if they all ignore me. I still have to try my best.”

“If you, dear reader, are looking a this across some great gulf of time and increase of knowledge, spare me your condescension. You too were young once, and ignorant once, and from a future standpoint—perhaps your own—you are young and ignorant still.”

“Mathematics is the gate and key of the sciences. … Neglect of mathematics works injury to all knowledge, since he who is ignorant of it cannot know the other sciences or the things of this world. And what is worse, men who are thus Ignorant are unable to perceive their own ignorance and so do not seek a remedy.”

“Your ignorance is the mother of your devotion to me.”

“When you ignore what people are saying on a daily basis, calling for the annihilation of your country, you are ignoring them at your own risk.”

“Courage is the ability to ignore your options.”

“Not ignorance, but ignorance of ignorance is the death of knowledge.”

“Still how unenlightened and ignorant are the very nations we term civilized!”

“To be truly ignorant, be content with your own knowledge.”