Martyn Lloyd-Jones

Give yourself to it,[the call to prayer] yield to it; and you will find not only that you have not been wasting time with respect to the matter with which you are dealing but that actually it has helped you greatly in that respect. You will experience an ease and a facility in understanding what you were reading, in thinking, in ordering matter for a sermon, in writing, in everything which is quite astonishing. Such a call to prayer must never be regarded as a distraction; always respond to it immediately, and thank God if it happens to you frequently.