Abstraction is the key to mathematics.
The initial conditions of the universe are a profound mystery, and inflation offers a possible explanation for why the universe looks the way it does.
To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things, every single day.
与他人说话时,要留有余地,别把心里想说的全部讲出来;画虎的形态很简单,但画出骨骼却很难;熟悉人的面貌很容易,但真正了解一个人的内心却很难。