(b) Those acts do not exclude external attention that either not at all or only in slight measure interfere with internal recollection in prayer. Such acts are slow walking, riding, looking about at the scenery, picking a flower now and then, dressing, undressing, bathing, combing the hair, etc, The Church prescribes certain prayers to be said while the priest vests for Mass, and it was an old rule among the monks to join labor and prayer.
2168. When External Attention Is Sufficient.—Is external attention sufficient in prayer when internal attention is voluntarily excluded?
(a) In public prayers external attention is sufficient as to a number of effects. Thus, in the administration of the Sacraments the want of internal attention in the minister does not make the Sacrament invalid, since the Sacraments produce grace _ex opere operato_; in public suffrages the indevotion and distraction of the priest do not deprive the beneficiary of the impetratory fruit, since the public prayers are offered in the name of the Church itself; in the Divine Office merely external attention suffices to fulfill the positive obligation, according to many, because it is not certain that the Church requires more.
(b) In all prayers mere external attention is insufficient for the personal effects of impetration, merit and satisfaction. For to pray with willful indevotion is not an act deserving of remission, reward and a favorable answer, but rather of punishment (“Before prayer prepare thy soul and be not as a man that tempteth God,” Eeclus., xviii. 23); it is disrespectful to God and therefore cannot claim the benefits of an act of worship.
2169. The Kind of Internal Attention Required in Prayer.—(a) The minimum that suffices for the personal benefits of merit and impetration is the verbal or the literal attention, and the imperfect attention that is mixed with some unwilled distractions or mind wanderings. Indeed, a person who intends to pray well, but whose whole prayer is a continual distraction in spite of his efforts to be recollected, does not lose, but rather by reason of his good will and effort increases, his merit. But for spiritual refreshment there must be freedom from distraction; for, just as a student gets no mental nourishment from a lesson if his mind is many miles away, and a listener gets no instruction from a discourse spoken in a foreign language (I Cor., xiv. 4), so one who prays with an absent mind loses the devotion and joy that are afforded by actual communion with heavenly thoughts.
(b) The maximum that should be aimed at in prayer for the greater blessing it brings is the spiritual attention fixed on the presence of God and the perfect attention that keeps away as far as possible the interruption from any vain, perverse or extraneous thoughts.
2170. Distractions.—Just as certain external acts exclude external attention, so also certain internal states exclude internal attention. These latter are known as distractions, and may be defined as internal acts or omissions opposed to the nature or purpose of prayer, but performed during prayer.
(a) Distractions are either acts or omissions. Thus, a person who slumbers lightly or is partly asleep during prayer is inattentive or wanting by omission; while the person who thinks out plots for stories or plays during prayer time is distracted or wanting by commission.
(b) Distractions are sometimes opposed to the nature of prayer. To the nature of vocal prayer belong the words and the sense, and hence, even though one is rapt in meditation, there is no vocal prayer if words are mispronounced or left out or so changed or transposed as to make nonsense or no sense, though negligence about a word here and there does not necessarily exclude superficial attention. Those who from long familiarity with forms of prayer are able to repeat them automatically, with no thought about the words or their meaning, direct or mystical, are not distracted if their thoughts are on the motive of prayer. But it would not be fitting to observe no order in these matters, for example, to dwell always on the glorious mysteries during passiontide prayer and on the sorrowful mysteries during paschal prayers.
(c) Distractions are sometimes opposed to the purpose of prayer. The purpose of prayer itself is the union of the mind with God, while the purpose of the one who prays is the special good to which he directs his prayer. Union with God is necessary above all in prayer, and though it need not be expressly thought on, as was said above (2169), yet there must be no thought in the mind contrary to it. Thoughts, desires and imaginations are contrary to the end of prayer when they are not means to that end (e.g., sinful thoughts, idle thoughts, thoughts on lawful occupations or affections that have nothing to do with the prayer), or when they are means to that end but are perverted to a purely natural use (e.g., when verbal attention is made an exercise in voice culture, or literal attention a grammatical study, or attention to the purpose of prayer means that one is speculating on foolish questions about divinity or thinking on the money, food, or clothing, for which one is praying as if they were the ends of prayer). Scrupulous persons make attention itself a distraction, for they worry all during prayer lest their thoughts be wandering, and so they are thinking about themselves rather than about the words, meaning or purpose of prayer.