Whenever an artist endowed with both a high level of artistic skill and a high degree of creativity combines these two abilities in the process of creating an artwork, the resulting product is a great work of art  Moreover, no work of art can be great unless both of these elements are combined in its execution
Thus, great works of art are necessarily rare
Anyone endowed with both a high level of artistic skill and a high degree of creativity will produce only a few great works of art.