The highest act that any human being can perform is Holy Communion.
To put it in simple terms (as I am so simple minded) Holy Communion is the intermingling of our creaturely selves with the very Godhead who created us. It is God’s great Joy to play with His Children like this.
We do this by consuming His Body and Blood under the forms of Consecrated bread and wine, just as He taught us to.
It is as simple or complex as that. That is how Holy Mystery works.
Sadly this simple Sacrament has become sullied. You see the public spectacle of receiving this Gift has become more important in the public consciousness than the Gift Itself.
Thus we find outrageously public sinners queuing for Holy Communion for the sheer show-business value of it. This is like folks gathering at the foot of the Cross only to further their own personal publicity. Shocking stuff!
If I was a priest giving out Holy Communion, and I recognized a public sinner presenting themselves, I hope I would have the fortitude to give them a simple blessing instead, and thus head off another sacrilege.
I know that Our Lord risked sacrilege by His Incarnation, and indeed courted it by His Passion and Death. As His disciples, I think it only meet that we be maximally respectful in carrying out our humble duties to Him, that we maintain a certain sacredness towards Him.
Access to the Blessed Sacrament is not for any Tom, Dick or Harry. No Sir!