"English usage is sometimes more than mere taste, judgment and education - sometimes it's sheer luck, like getting across the street"

This quote by E. B. White recommends that the ability to use English correctly is not constantly based upon one's education, taste, or judgment. Instead, it can be an issue of luck. This suggests that also if a person has a great education and learning and also taste, they may still make errors in their English use. It resembles going across the road - also if you look both means and also take all the essential safety measures, you might still obtain struck by a cars and truck. Similarly, also if you have a great education and learning and also good taste, you may still make mistakes in your English usage. This quote suggests that English usage is not constantly a matter of skill, however in some cases it is a matter of luck.