This quote applies to those who can’t see the world around them. When people are blind they likely look at problems only one way. This way of thought is probably the same way that got them into the problem to begin with. When a person is a visionary they can take in information from all directions and use reason and logic to solve problems. Thinking the same way about different problems will never work. It is the same way that some people are taught only to look at small details. Then when those details change, the new problem is unsolvable because the small details are different. Only paying attention to the small details will blind you.