The composer Peter Ilyich Tchaikovsky called inspiration The Capricious Guest. Wait for him to arrive and you may be waiting for a long while.
I've been doing a little writing recently and finding the hardest part is getting going. Inspiration doesn't fall from the sky. The apple of isn't hovering above my head ready to plummet any time soon. The word inspire means "breathes in". Sometimes the creative process feels just like that. Breathing. Sometimes we just need to show up at the desk (or the studio) and work, process, hoping that good comes from just keep going.
In the bible the word inspire appears in 2 Timothy 3:16, "All Scripture is inspired by God..." The Greek word here is theoneusi which translates "breathed-out". The bible writers were inspired in a very different way than we are. The words of the bible were breathed out by God rather than breathed in by men.
Since all creativity originates in the character of God, ultimately all inspiration, in all its forms, comes from him too.