This quote by Edith Sitwell is a commentary on the concept of having taste. She is suggesting that having taste can be a vice, or an unfavorable quality. She indicates that having good taste can result in a sense of supremacy and snobbery, and can be utilized to judge and criticize others. It can also result in an absence of imagination and originality, as people with good taste might be too concentrated on following the rules and conventions of what is thought about to be taste. Sitwell is suggesting that having good taste can be a barrier to individual growth and development, and can cause a narrow-mindedness and lack of appreciation for various point of views. Eventually, she is suggesting that having good taste can be a negative trait, and should be prevented.