The job should make maximum use of our abilities, skills, and talents. An underutilized person is invariably frustrated. The job should allow us to reach a position of eminence in our chosen field. We should be able to rise through promotion to a position of authority and responsibility. We should be able to work at our own pace free of all deadlines and pressures.
Successful work leaves no stress scars.
Enjoyable and satisfying work cannot be distinguished from play. The job should allow us to do our very best work and to take pride in the work we do. It should encourage us to reach out for high achievement by being ready to tackle challenging new tasks that we have never done before and that, in the process, provide a feeling of success and accomplishment. We should be able to continue to work without any pressure to retire for as long as we wish. There may be a hundred more life-extenders, but the above are sufficient to give us an idea of what it takes to live to be 100.