The Spirit's Work

Porro ad faciendum bonum quid in nobis Spiritus bonus operatur? Profecto monet, et movet, et docet. Monet memoriam, rationem docet, movet voluntatem. In his enim tribus tota consistit anima nostra. Memoriae suggerit bona in cogitationibus sanctis, atque ita ignaviam nostram torporemque repellit. Propterea quoties hujusmodi suggestionem boni senseris in corde tuo, da honorem Deo, et age reverentiam Spiritui sancto, cujus vox sonat in auribus tuis. Ipse namque est qui loquitur justitiam. Et in Evangelio habes quia ille suggeret vobis omnia, quaecunque dixero vobis. Et adverte quid praemiserit: Ille vos docebit omnia. Dixeram enim quia docet rationem. Multi siquidem monentur, ut benefaciant; sed minime sciunt quid agendum sit, nisi adsit denuo gratia Spiritus sancti; et quam inspirat cogitationem, doceat in opus proferre, ne vacua in nobis sit gratia Dei. Sed quid? Scienti bonum, et non facienti, peccatum est illi gratia. Propterea non solum moneri et doceri, verum etiam moveri et affici ad bonum necesse est ab eo utique Spiritu, qui adjuvat infirmitatem nostram, et per quem in cordibus nostris diffunditur charitas, quae est bona voluntas. Sanctus Bernardus Clarae Vallensis, Sermones De Tempore, In Festo Pentecostes, Sermo I Source: Migne PL 183.325a-c

But for the doing of good how does the good Spirit work in us? Certainly He admonishes, He prompts, and He teaches. He admonishes with memory, He teaches with reason, and He moves the will. In these three things our soul is established. With memory He suggests good things in thinking of the saints, and thus He drives away our indolence and torpor, and therefore every day you shall sense an encouragement to do good in your hearts, to give honour to God and to revere the Holy Spirit whose voice resounds in your ears, for He speaks righteousness. And in the Gospel you have it that He suggests everything to you, 'Whatever I have said to you.' And look to what precedes, 'He shall teach you everything.' 1 I have said he teaches with reason, and certainly He regularly admonishes so that we might do good, for hardly anyone would know what to do unless refreshed with the grace of the Holy Spirit. And He teaches us with inspiring thought what work we should turn to, lest the grace of God be empty in us. But why? Because to know what is good and not to do it is a sin for the one who has grace. 2 Therefore He does not only admonish and teach, but it is truly necessary that the Spirit moves us to and fixes us in what is good, He who helps us in our weakness and through whom love is diffused in our heart, which is a good will. 3 Saint Bernard of Clairvaux, Sermons for the Year, On Pentecost, from the First Sermon 1 Jn 14.26 2 Jam 4.17 3 Rom 8.26, Rom 5.5