He prays unceasingly who combines prayer with necessary duties and duties with prayer. Only in this way can we find it practicable to fulfill the commandment to pray always. It consists in regarding the whole of Christian experience as a single great prayer. What we are accustomed to call prayer is only a part of it.
ORIGEN On Prayer, 12
Brother Lawrence felt it was a great delusion to think that the times of prayer ought to differ from other times. We are as strictly obliged to adhere to God by action in the time of action, as by prayer in its season. His own prayer was nothing else but a sense of the presence of God, his soul being at that time insensible to everything but Divine Love. When the appointed times of prayer were past, he found no difference, because he still continued with God, praising and blessing Him with all his might. Thus he passed his life in continual joy.
BROTHER LAWRENCE OF THE RESURRECTION The Practice of the Presence of God, CH 1 Conversations