"Never explain what you do. It speaks for itself. You only muddle it by talking about it"

This quote by Shel Silverstein is a tip to trust in the quality of your work and to not hesitate to let it promote itself. It is recommending that when you explain what you do, you are not necessarily adding to the understanding of your work, but instead muddling it. This is due to the fact that when you describe your work, you are most likely to focus on the details and technical elements, which can be complicated and diminish the overall message. Rather, it is better to let your work speak for itself and let the audience analyze it in their own way. This way, the audience can form their own viewpoint and understanding of your work, which can be more effective than any explanation you could offer.