Reminds me of the Oliver Wendel Holmes excerpt again:
No will of your own with its puny compulsion
Can summon the spirit that quickens the lyre;
It comes, if at all, like the Sibyl's convulsion
And touches the brain with a finger of fire.
I infer you are asking about 'inspiration'. Some say the Muse, should she knock on your door, should be coaxed to stay by the use of two fingers of brandy. Coleridge preferred opium, I believe. Its opposite would be 'writer's block'.