Sometimes you surprise yourself.
Giving your work a rest is well known advice for writers, and it has its purpose.
When the work has had time away from the eyes coming to it again brings a new perspective.
That perspective might surprise you. The work is usually better than you remember.
That in and of itself brings inspiration to continue.
Working on multiple projects, all at different phases, also gives the mind rest.
Inspiration and creativity are precious resources that can be used strategically. Giving one project a rest to work on another can refresh the imagination.
Look with new eyes.