He begins the work, you remember, with an account of human nature, account of human psychology, as a product of sense and experience.

他的书开始于，关于人性的解释，关于人类心理的解释，作为理性和经验的产物。

耶鲁公开课 - 政治哲学导论课程节选

In many ways you can look at most of our experiences, psychological effective experiences on a continuum, where some of them fall below the zero, the negative experiences or the painful experiences and the positive or the pleasurable experiences between the zero and the positive.

可以从多方面来看我们的经验，在心理连续谱上看有效心理经验，有时候会跌倒0以下，不愉快或痛苦的经历,积极或愉快的经历,分别在0与正值之间。

哈佛公开课 - 幸福课课程节选