"The only limit to our realization of tomorrow is our doubts of today."

Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.

创造性力量很容易变成破坏性力量。这只取决于人们的道德人格：是用此力量做好事或做坏事。如果人们缺乏这种道德人格，则没有一种说教能够提供它或取而代之。