怀疑在一段时间内是有用的。我们都必须经过客西马尼园。如果基督也曾与怀疑玩耍，那么我们也必须如此。

父母死气沉沉的生活对周围人特别是自己孩子的影响，是无与伦比的。

反向传播最重要的地方在于它只是链式法则。

The best technologies fail without the right people to implement them.

Every moment is a fresh beginning.

I'm a failed poet. Maybe every novelist wants to write poetry first, finds he can't, and then tries the short story, which is the most demanding form after poetry. And, failing at that, only then does he take up novel writing.