Inspiration is always a very uncertain thing; it comes when it chooses, stops suddenly before it has finished its work, refuses to descend when it is called. This is a well-known affliction, perhaps of all artists, but certainly of poets. There are some who can command it at will; those who, I think, are more full of an abundant poetic energy than careful for perfection; others who oblige it to come whenever they put pen to paper but with these the inspiration is either not of a high order or quite unequal in its level. Again there are some who try to give it a habit of coming by always writing at the same time; Virgil with his nine lines first written, then perfected every morning, Milton with his fifty epic lines a day, are said to have succeeded in regularising their inspiration. It is, I suppose, the same principle which makes gurus in India prescribe for their disciples a meditation at the same fixed hour every day. It succeeds partially of course, for some entirely, but not for everybody. For myself, when the inspiration did not come with a rush or in a stream,—for then there is no difficulty,—I had only one way, to allow a certain kind of incubation in which a large form of the thing to be done threw itself on the mind and then wait for the white heat in which the entire transcription could rapidly take place. But I think each poet has his own way of working and finds his own issue out of inspiration’s incertitudes.
26 January 1932
Letters on Poetry and Art, Vol 27, CWSA.