This pleasure principle in thinking is the source of all our mental biases.

这种思维中的快乐原则是我们所有心理偏误的根源。

There needs to be something that you can sit there and that gets you moving so you've got a really strong pain principle — a really strong pleasure principle.

需要有一些东西可以让你坐在那里，让你动起来，这样你就有了一个非常强烈的痛苦原则——一个非常强烈的快乐原则。