Dominus et magister noster Iesus Christus dicendo ‘Penitentiam agite &c.’ omnem vitam fidelium penitentiam esse voluit.
dominus – Lord; magister – master; noster – our; dicendo – saying (participle); penitentiam agite – repent (literally – “do penance”); omnem – all, entire; vitam – life; fidelium – of the faithful (gen. pl.); penitentiam - penance, repentance ; esse – to be (inf.); voluit – wish, will, desire (English cognate – volition)
Our Lord and master Iesus Christus, by saying “repent”, desired that the entire life of the faithful be repentance.