The most difficult thing is to be simple.

Entanglement is not just a curious feature of quantum mechanics - it is the essential feature.

Spend each day trying to be a little wiser than you were when you woke up.

我从不回头看，我总是向前看。

初心本无善恶，但念头一动，便有了分别心。与其纠结对错，不如回归本心，像孩子一样纯粹地看待世界。