Coal built this country, and coal will keep it strong.

大的不怕与小的同游，居中的却远避之。

The beauty of mathematics lies in its ability to describe the universe in a language that transcends cultural and linguistic barriers.

Habit is far more dependable than inspiration. Make progress by making habits. Don‘t focus on getting into shape. Focus on becoming the kind of person who never misses a workout.

要理解现在，必须先理解过去。