16 History bears witness that the virtues of the Christian life have flourished best wherever and whenever the frequent reception of the Eucharist has most prevailed. And on the other hand it is no less certain that in days when men have ceased to care for this heavenly bread, and have lost their appetite for it, the practice of Christian religion has gradually lost its force and vigour. And indeed it was a needful measure of precaution against a complete falling away that Innocent III, in the Council of the Lateran, most strictly enjoined that no Christian should abstain from receiving the communion of the Lord's Body at least in the solemn paschal season. But it is clear that this precept was imposed with regret, and only as a last resource; for it has always been the desire of the Church that at every Mass some of the faithful should be present and should communicate. "The holy Synod would wish that in every celebration of the Mass some of the faithful should take part, not only by devoutly assisting thereat, but also by the sacramental reception of the Eucharist, in order that they might more abundantly partake of the fruits of this holy Sacrifice" (conc. Trid., Sess. XIII. de Euchar . c. viii).
Source: Mirae Caritatis (Vatican.va)