Grieving The Spirit

Et nolite contristare Spiritum sanctum Dei, in quo signati estis in diem redemptionis. Cum bene agimus, gaudet in nobis Spiritus sanctus, datus nobis, videns monita sua proficere utilitatibus nostris, sicut dictum est a Domino: Ita gaudium erit in coelo in uno peccatore poenitentiam agente. Gaudet ergo Spiritus sanctus saluti nostrae, non sibi, qui non indiget laetitia; ita, e contrario, si obedientes ei non fuerimus, contristatur, quia non habet profectum in nobis; vult enim nos pertinere ad vitam. Non tamen sic contristatur, ut patiatur, quippe cum impassibilis sit: sed cum eum contristatum dicit, nostri causa hoc significat; quia deserit nos eo quod laeserimus eum, contemnendo monita ejus. Contristatio itaque ejus indignitas nostra est, quae filios nos Dei prohibet appellari; ipse enim est Spiritus sanctus, qui sanctificat filios Dei, manens in nobis. Ambrosiaster, In Epistolam ad Ephesios, Caput IV Source: Migne PL 17.393a

And do not grieve the Holy Spirit of God, with whom you have been signed for the day of redemption. 1 When we act well, the Holy Spirit that has been given to us rejoices in us, seeing that His warnings have advanced our usefulness, as it was said by the Lord 'Thus there will be joy in heaven for the repentance of one sinner.' 2 Therefore the Holy Spirit rejoices in our salvation, and not for Himself since He does not lack any joy. Thus, on the contrary, if we are not obedient to Him, He is aggrieved, because He does not note any improvement in us, He who wishes to lead us to life. But is not that when He is grieved that He suffers, for certainly He is impassible, but when it says that we grieve Him, it signifies that we are the cause, because of which He deserts us, since we oppose Him and scorn His warnings. Thus His grieving is our unworthiness, which forbids us to be called sons of God, for it is by the Holy Spirit’s remaining in us that we are sanctified as sons of God. Ambrosiaster, Commentary On The Letter of Saint Paul To The Ephesians, Chapter 4 1 Ephes 4.30 2 Lk 15.10