The only foes that threaten America are the enemies at home, and these are ignorance, superstition and incompetence.
The quintessential revolution is that of the spirit, born of an intellectual conviction of the need for change in those mental attitides and values which shape the course of a nation's development. A revolution whichaims merely at changing official policies and institutions with a view to an improvement in material conditions has little chance of genuine success. Without a revolution in spirit, the forces which had produced inequities of the old order would continue to be operative, posing a constant threat to the process of reform and regeneration. It is not enough merely to call for freedom, democracy and human rights. There has to be a united determination to persevere in the struggle, to make sacrifices in the name of enduring truths, to resist the corrupting influences of desire, ill will, ignorance, and fear.
The only good is knowledge, and the only evil is ignorance.
We fear things in proportion to our ignorance of them.
In expanding the field of knowledge we but increase the horizon of ignorance.
Lawyers are the only persons in whom ignorance of the law is not punished.
The field is a halfway house, halfway between the detail of those intimately known places and the ignorance of a landscape view ... The essence of a field is that the cultural accommodates the natural there. The human being makes room for and makes use of those organisms that are not him. In that way the field is a poem to symbiosis, and a human contract with the natural.
The democratic theory is that if you accumulate enough ignorance at the polls, you produce intelligence.
Curiosity is a willing, a proud, an eager confession of ignorance.
The mark of your ignorance is the depth of your belief in injustice and tragedy.