Enjoyment appears at the boundary between boredom and anxiety, when the challenges are just balanced with the person’s capacity to act.

The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.

Flow is being completely involved in an activity for its own sake. The ego falls away. Time flies. Every action, movement, and thought follows inevitably from the previous one, like playing jazz. Your whole being is involved, and you're using your skills to the utmost.

学习阅读涉及注意力网络的发展，使儿童能够专注于字母和单词，同时忽略干扰。

不慎重的话语会导致苦难，而温和的言语能带来和平。