Whether the sinner sins in receiving Christ's body sacramentally?

Objections

Objection 1 : It seems that the sinner does not sin in receiving Christ's body sacramentally, because Christ has no greater dignity under the sacramental species than under His own. But sinners did not sin when they touched Christ's body under its proper species; nay, rather they obtained forgiveness of their sins, as we read in Lk. 7 of the woman who was a sinner; while it is written (Mt. 14:36) that "as many as touched the hem of His garment were healed." Therefore, they do not sin, but rather obtain salvation, by receiving the body of Christ.
Objection 2 : Further, this sacrament, like the others, is a spiritual medicine. But medicine is given to the sick for their recovery, according to Mt. 9:12: "They that are in health need not a physician." Now they that are spiritually sick or infirm are sinners. Therefore this sacrament can be received by them without sin.
Objection 3 : Further, this sacrament is one of our greatest gifts, since it contains Christ. But according to Augustine (De Lib. Arb. ii), the greatest gifts are those "which no one can abuse." Now no one sins except by abusing something. Therefore no sinner sins by receiving this sacrament.
Objection 4 : Further, as this sacrament is perceived by taste and touch, so also is it by sight. Consequently, if the sinner sins by receiving the sacrament, it seems that he would sin by beholding it, which is manifestly untrue, since the Church exposes this sacrament to be seen and adored by all. Therefore the sinner does not sin by eating this sacrament.
Objection 5 : Further, it happens sometimes that the sinner is unconscious of his sin. Yet such a one does not seem to sin by receiving the body of Christ, for according to this all who receive it would sin, as exposing themselves to danger, since the Apostle says (1 Cor. 4:4): "I am not conscious to myself of anything, yet I am not hereby justified." Therefore, the sinner, if he receive this sacrament, does not appear to be guilty of sin.