2.
Learning to learn is to know how to navigate in a forest of facts, ideas and theories, a proliferation of constantly changing items of knowledge. Learning to learn is to know what to ignore but at the same time not rejecting innovation and research.
Raymond Queneau
4.
Knowledge, learning, talents are not necessarily connected with sound moral and political principles.... And eminent abilities, accompanied with depravity of heart, render the possessor tenfold more dangerous in a community.
Noah Webster