There is no valid communion without a valid priesthood. And as for the Catholic Church understanding is intrinsic. Even as children we are taught the Real Presence because we have to know the miracle taking place and believe before we can accept. That is not mere symbolism. We’re not talking Saltines and Welch’s grape juice here.
All that stuff is between a man and his God. The Bible authorizes no one to exclude one from taking communion.
There is no NT priesthood except for the priesthood of the believers.
There's no need for it because there is no longer any sacrifice for sin that needs to be offered. Jesus said *It is finished* when He died on the cross and the veil in the temple was torn in two from top to bottom, by God Himself, showing that the way to the Holy of Holies was now open and men had direct access to Him without priests.
Jesus death was final and once for all, and He is now seated at the right hand of God waiting for His enemies to be made His footstool.