From personal experience, there is a lot of truth to this statement. Now, this is not saying focus over time characterizes my life but when times I am deeply focused it is true that I accomplish more in a much shorter amount of time.
That doesn’t mean we can have 100% focus all the time and do more by just focusing more. We still need rest and breaks to be able to reenergize our focus for those during these times.
Goals. Deadlines. Intentionality. Focus. Rest. Repeat.
Preaching to the choir here. A good reminder from the always helpful, James Clear.
Note: If you haven’t read his book, Atomic Habits, then what’re you doing with your life?! The book is probably the best one out there for productivity and focus.