There is no doubt that even the greatest musical geniuses have sometimes worked without inspiration. This guest does not always respond to the first invitation. We must always work, and a self-respecting artist must not fold his hands on the pretext that he is not in the mood. If we wait for the mood, without endeavouring to meet it half-way, we easily become indolent and apathetic. We must be patient, and believe that inspiration will come to those who can master their disinclination.
Inspiration is necessary, but it is not beyond your control. You can do things to invite inspiration. You can be prepared and rehearsed and studied in order to capture it and make best use if it when it arrives.
Your lack of work is not the result of a lack of inspiration. It’s the other way around.