Poetry is not like reasoning, a power to be exerted...

Poetry is not like reasoning, a power to be exerted according to the determination of the will. A man cannot say, 'I will compose poetry.' The greatest poet even cannot say it; for the mind in creation is as a fading coal, which some invisible influence, like an inconstant wind, awakens to transitory brightness...and the conscious portions of our natures are unprophetic either of its approach or its departure.