我不是政治家，我不是传教士，我只是个说唱歌手。

If you can dream it, you can achieve it.

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

解释：看到兔子再回头唤猎狗，还不算太晚；跑掉了羊再去修补羊圈，也不算太迟。