强者的权力除了建立在人民的意见和信仰之上外,别无基础。
Immature poets imitate; mature poets steal.
One can choose to go back toward safety or forward toward growth. Growth must be chosen again and again; fear must be overcome again and again.
"The best way to learn mathematics is to do mathematics."
The signal of human influence on climate has emerged from the noise of natural variability.