It is a good thing to let prayer be the first business of the morning and the last at night. Guard yourself carefully against those false, deluding ideas which tell you, “Wait a little while. I will pray in an hour; first I must attend to this or that.” Such thoughts get you away from prayer into other affairs which so hold your attention and involve you that nothing comes of prayer for that day.
—Martin Luther, A Simple Way to Pray
Wherever there is the grace of God, human beings pray. God works in us, for we know not how to pray as we ought. It is the Spirit of God that incites us and enables us to pray in a fitting manner. We are not skilled to judge whether we are worthy or capable of praying, or whether we have sufficient zeal to pray. Grace in itself is the answer to this question. When we are comforted by the grace of God, we begin to pray with or without words.
—Karl Barth, Prayer
We know not what to pray for as we ought in regard to tribulations, which may do us good or harm; and yet, because they are hard and painful, and against the natural feelings of our weak nature, we pray, with a desire which is common to mankind, that they may be removed from us. But we ought to exercise such submission to the will of the Lord our God, that if He does not remove those vexations, we do not suppose ourselves to be neglected by Him, but rather, in patient endurance of evil, hope to be made partakers of greater good, for so His strength is perfected in our weakness.
—St. Augustine, Letter to Proba
Always respond to every impulse to pray. The impulse to pray may come when you are reading or when you are battling with a text. I would make an absolute law of this—always obey such an impulse. Where does it come from? It is the work of the Holy Spirit.
—D. Martyn Lloyd-Jones, Preaching and Preachers