A person's job is their role in society. A job is an activity, often regular and often performed in exchange for payment. Many people have multiple jobs, such as those of parent, homemaker, and employee. A person can begin a job by becoming an employee, volunteering, starting a business, or becoming a parent. The duration of a job may range from an hour (in the case of odd jobs) to a lifetime (in the case of some judges). The activity that requires a person's mental or physical effort is work (as in "a day's work"). If a person is trained for a certain type of job, they may have a profession. The series of jobs a person holds in their life is their career.

The Book of Job (; Hebrew: אִיוֹב Iyov) is one of the Writings (Ketuvim) of the Hebrew Bible, and the first poetic book in the Christian Old Testament. Addressing the theme of God's justice in the face of human suffering – or more simply, "Why do the righteous suffer?" – it is a rich theological work setting out a variety of perspectives. It has been widely and often extravagantly praised for its literary qualities, with Alfred, Lord Tennyson calling it "the greatest poem of ancient and modern times".