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.
I'm not afraid of failure because it's part of success.
科学的美在于它让我们看到的不是世界的现状,而是它可能的样子。
The very definition of the real becomes: that of which it is possible to give an equivalent reproduction.
The free, exploring mind of the individual human is the most valuable thing in the world.