In order that people may be happy
In 1851 John Ruskin* said:
In order that people may be happy at work, these three things are needed:
They must be fit for it, they must not do too much of it, and they must have a sense of success in it.
*John Ruskin (8 February 1819 – 20 January 1900) was the leading English art critic of the Victorian era, as well as an art patron, draughtsman, watercolourist, a prominent social thinker and philanthropist.