A third psychological benefit is that each project in the network of enterprises provides an escape from the others. In truly original work, there will always be impasses and blind alleys. Having another project to turn to can prevent a setback from turning into a crushing experience. The philosopher Søren Kierkegaard called this ‘crop rotation’. One cannot use the same field to grow the same crop indefinitely; eventually the soil must be refreshed by planting something new or simply taking a break.
Tim Harford
Messy: How to Be Creative and Resilient in a Tidy-Minded World