For a soul truly loving the Lord, there is no better prayer than to offer Him the toil and illness one suffers, to remember for whom one suffers, to submit to His will, and other similar things as circumstances suggest. Prayer is an act of love. And it is a mistaken notion that one cannot pray when one does not have time and solitude available. With a little attention, we can accumulate great wealth even when the Lord takes hours designated for prayer through various trials...
(Teresa of Jesus, The Book of Life VII,12)