We need both to be able to focus on one thing as well as to be able to explore new ideas.
Details
Ochin Vartanian analysed nobel prize winners and other scientists adn concluded that flexible focus distinguishes them: “Specifically, the problemsolving behavior of eminent scientists can alternate between extraordinary levels of focus on specific concepts and playful exploration of ideas. This suggests that successful problem solving may be a function of flexible strategy application in relation to task demands.” (Vartanian 2009, 57)