Basil of Caesarea

In this way we acquire a recollected spirit—when in every action we beg from God the success of our labors and satisfy our debt of gratitude to him who gave us the power to do the work, and when, as has been said, we keep before our minds the aim of pleasing him. If this is not the case, how can there be consistency in the words of the apostle bidding us to "pray without ceasing," with those other words: "we worked night and day"? Thanksgiving at all times has been commanded even from law and has been proved necessary to our life from both reason and nature. So we should not therefore be negligent in observing those times for prayer customarily established in communities—times which have inevitably been selected because each period contains a reminder peculiar to itself of blessings received from God.