An Enlargement of Heart

Cum invocarem, exaudivit me Deus iustitiae meae: cum invocarem, exaudivit me Deus, inquit, a quo est iustitia mea. In tribulatione dilatasti mihi: ab angustiis tristitiae, in latitudinem gaudiorum me duxisti; tribulatio enim et angustia in omnem animam hominis operantis malum. Qui autem dicit: Gaudemus in tribulationibus, scientes quoniam tribulatio patientiam operatur, usque ad illud ubi ait: Quoniam caritas Dei diffusa est in cordibus nostris per Spiritum sanctum, qui datus est nobis, non habet cordis angustias, quamvis extrinsecus a persequentibus ingerantur. Mutatio autem personae, quod a tertia, ubi ait, exaudivit, statim transiit ad secundam, ubi ait, dilatasti mihi, si non varietatis ac suavitatis causa facta est, mirum cur primum tamquam indicare voluit hominibus exauditum se esse, et postea compellare exauditorem suum. Nisi forte cum indicasset quemadmodum exauditus sit in ipsa dilatatione cordis, maluit cum Deo loqui; ut etiam hoc modo ostenderet quid sit corde dilatari, id est, iam cordi habere infusum Deum, cum quo intrinsecus colloquatur. Quod in persona eius qui credens in Christum illuminatus est, recte accipitur. Sanctus Augustinus Hipponensi, Enarratio in Psalmum IV

'When I called, the God of my righteousness heard me'  1 When I called, God heard me, he says, from whom is my righteousness. 'In tribulation You have enlarged me.' From the narrow ways of sorrow into the broad ways of joy You have led me. For, 'tribulation and narrowness is on every soul of man who is a worker of evil.' 2 But he who says, 'We rejoice in tribulations, knowing that tribulation works patience;' up to that place where he says, 'Because the love of God is spread about in our hearts by the Holy Spirit, which is given to us,' 3 has no narrowness of heart, although from without persecutors heap up trouble upon him. There is a change of person here, from the third person, where he says, 'He heard,' he passes at once to the second person, where he says, 'You have enlarged me,' which if it be not done for the sake of variety and style, makes one wonder why he first wishes to tell men that he had been heard, and afterwards address Him who heard him. Unless perhaps when he had declared how he was heard, in this enlargement of heart, he preferred to speak with God, that even in this way he might show what it is to be enlarged in heart, that is, to have God already infused in the heart, with Whom he might speak to within. Which is rightly to be understood as the person of him who, believing in Christ, has been enlightened. Saint Augustine of Hippo, Expositions on the Psalms, Psalm 4 1 Ps 4.1 2 Rom 2.9   3 Rom 5.3-5