Careful Watching

Nisi Dominus custodierit civitatem, in vanum vigilabunt qui custodiunt eam. De domo ad civitatem transitum facit, ut nec in singulis elatio detestanda surripiat, nec in Ecclesia sancta jactantia perniciosa praevaleat. Civitas enim Domini Jerusalem intelligitur coelestis, cujus adhuc pars peregrinatur in terris, in qua episcopi vigilare contendunt, ut commissum sibi gregem pergvigili cura custodiant. Quibus idem dicitur: ne noxiis cogitationibus incitentur, et credant aliquid humanas vigilias praevalere, cum sola Divinitas incursionis pericula possit arcere Intelligimus quam sit impudens Pelagiana, quam iniqua praesumptio, ut contra eam decreverit toties Spiritus sanctus dicere, quod tamen ipsa passa non sit audire. Cassiodorus, Expositio In Psalterium, Psalmus CXXVI Source: Migne PL 70.928c

Unless the Lord guards the city, they watch in vain who guard it. 1 He passes from the house to the city, that there not rise up in anyone a detestable elation, and there not prevail a wicked boasting in the holy Church. For the city of the Lord is understood to be the heavenly Jerusalem, a part of which yet journeys on earth, in which the bishops are admonished to be watchful, that they guard with all vigilance the flock which has been entrusted to them. To whom the same is said, lest they are lifted up by vile thoughts and come to believe that human watching is enough, when it is the Divine alone that is able to guard against the peril of attacks. Which we understand to be that shameless Pelagianism, which iniquitous presumption so often speaks against what the Holy Spirit has decreed, which however it will not suffer to hear. Cassiodorus, Commentary On The Psalms, from Psalm 126 1 Ps 126.2