要在最高水平上取得成功,你必须心理强大。
That neither our thoughts, nor passions, nor ideas formed by the imagination, exist without the mind, is what every body will allow.
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
天下的事情有难易之分吗?只要去做,难的也会变容易;不去做,容易的也会变难