I know I must let the children be attentive, but neglect the most terrible danger of children.
我知道必须让孩子们有所专心,怠慢乃是孩子们最可怕的危险。
Competition regulates the rate of profit, and profit regulates the rate of accumulation.
在数学中,提出问题的艺术必须比解决问题更有价值。
Opportunities don’t happen, you create them.
艺术应该让舒适的人不安,让不安的人舒适。