Pray without ceasing.
A second meaning is this. Never suspend the regular offering of prayer. You will, if you are a watchful Christian, have your times of daily devotion, fixed not by superstition, but for your convenience and remembrance; just as David, three times a day, and as another saint, seven times a day, sought the Lord: now be sure to keep up this daily prayer without intermission. This advice will not comprehend the whole range of the text, I am not pretending that it does; I am only mentioning it now as supplementary to other thoughts. "Pray without ceasing;" that is, never give up the morning prayer, nor the evening prayer, nor the prayer at midday if such has grown to be your habit. If you change hours and times, as you may, yet keep up the practice of regularly recurring retirement, meditation, and prayer. You may be said to continue in prayer if your habitual devotions be maintained. It would be quite correct for me to say that I know a man who has been always begging ever since I have been in London. I do not think that I ever passed the spot where he stands without seeing him there. He is a blind person, and stands near a church. As long as my recollection serves me he has been begging without ceasing; of course he has not begged when he has been asleep, he has not begged when he has gone home to his meals, nor did you understand me to have asserted anything so absurd when I said he had begged without ceasing for years. And so, if at those times when it is proper for you to separate yourself from your ordinary labors, you continue perseveringly begging at mercy's throne, it may be with comparative correctness said of you that you pray without ceasing. Through all hours are alike to me, I find it profitable to meet with God at set periods, for these seem to me to be like the winding up of the clock. The clock is to go all day, but there is a time for winding it up; and the little special season that we set apart and hedge round about for communion with our God, seems to wind us up for the rest of the day. Therefore, if you would pray without ceasing, continue in the offering of the morning and the evening sacrifice, and let it be perpetually an ordinance with you, that your times of prayer are not broken in upon.
