Charles Haddon Spurgeon said this quote

Are you placed where others are sitting down idly, doing nothing? Rise to the work with all your powers; and when the sweat stands upon your brow, and you are tempted to loiter, cry, No, I cannot stop, for I am Christ's. If I were not purchased by blood, I might be like Issachar, crouching between two burdens; but I am Christ's, and cannot loiter.