Concentration always throws light and gives one greater clarity. Even scientists know that they have to concentrate on a problem before they can solve it.
Most of the time, the solution to any problem a person is trying to solve is already within him. It is present in the subconscious level but the solution will not be evident unless his mind is in a focussed condition.
THE MOMENT THE MIND IS FOCUSSED, THE ANSWERS FALL INTO PLACE.
From my experience, many questions that I have focussed on have found their own answers. Somehow, somewhere, almost inevitably, the answers come.