Inspiration cannot be created or invented but can only be discovered within the artist himself, and it is a law of its own nature. It is the most precious possession and the source of innermost happiness.
Although the inspiration may be strong and durable and able to support a lifetime's work, it cannot be taken for granted and there is no guarantee of permanent possession. It may be mislaid or even lost, and retrieval is very difficult. It may lie dormant, and be discovered late in life after a long struggle.
Why it should be that some people have this sort of inspiration while others do not, and what 'meaning' it has, is not something which lends itself to argument. Nor is it up to the artist to decide how important it is, or what value it has for other people. To ascertain this is perhaps beyond even the capacities of an artist's own time.