It isn't making mistakes that's critical; it's correcting them and getting on with the principal task. — Donald Rumsfeld Copy Share Image
“As in all such technological nightmares, the principal task is to foresee what is possible; to educate use and misuse; and to… — Carl Sagan Copy Share Image
The principal task of a conductor is not to put himself in evidence but to disappear behind his functions as much as… — Franz Liszt Copy Share Image
