Better to be ignorant of a matter than half know it. Publilius Syrus
To be ignorant of what occurred before you were born is to remain always a child. Cicero
Have the courage to be ignorant of a great number of things, in order to avoid the calamity of being ignorant of everything. Sydney Smith
To be ignorant of the lives of the most celebrated men of antiquity is to continue in a state of childhood all our days. Plutarch
The scientist rigorously defends his right to be ignorant of almost everything except his specialty. Marshall McLuhan
My mission is to suffer for all those who suffer without knowing it. I must pay for them, expiate their unconsciousness, their luck to be ignorant of how unhappy they are. Emil Cioran