Progress is impossible without change, and those who cannot change their minds cannot change anything.
没有改变就不可能进步,而无法改变思想的人也无法改变任何事。
解释:善念不可轻易丧失,恶念不能肆意滋长。
如果知识会造成问题,那么即使透过无知,我们也无法解决这些问题。
The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.