The past is a source of knowledge, and the future is a source of hope. Love of the past implies faith in the future.
The truth is, we all have our own version of reality, and sometimes it's hard to reconcile the two.
No one is an artist unless he carries his picture in his head before painting it.
我不会接受否定的答案。
The essence of mathematics is not to make simple things complicated, but to make complicated things simple.