我不缺乏把一个想法彻底思考下去的勇气，到目前为止，我还没有遇到过我害怕的想法。

The challenge in computational learning theory is to understand the capabilities and limitations of learning algorithms.

The key to a happy life is not in avoiding problems, but in learning how to deal with them effectively.

真相往往埋藏在层层谎言之下。