— 1) THERE IS NO BIBLICAL REASON TO RESTRICT BASED ON INTELLIGENCE…
There is only one major passage used to try to go against it. 1 Cor 11. This passage isn’t telling people that if they don’t intellectually examine their sin before communing they will be in trouble. It is saying, there were people (gluttonous and rich) who were pushing out others at the table (poor and hungry). That kind of inequality and disunity is the exact opposite of the message of the table itself — unity and equality before the Lord. Also, some were still eating at demonic idol feasts, and Paul says: Choose one God or another! This is what is meant by “let each one examine himself that he not partake in an unworthy manner.” Not that we are to be “sinless enough” but that we are not to DEFILE the table by idol worship or hypocrisy directly related to the unity of the covenant community. (You see this same problem in Gal 1 with Peter and the Gentiles).
Baptism means a child is a Christian – it is the sign of initiation, the declaration of family membership, and the meal is the covenant renewal ceremony and is to be done for the whole covenant community…
In the Old Testament the two sacraments were circumcision and passover, and EVERYONE took the passover, down to the smallest who could eat. If we were going to change that we would expect a statement explaining the loss of covenant renewal to all the children, and the mentally handicapped.
But there is NO new testament statement dealing with that. 1 Cor 11 is about not destroying the symbolic meaning of the meal, and NEVER does he say – “restrict these people from the table.”
— 2) PRACTICE OF THE WHOLE CHURCH UNTIL THE MIDDLE AGES
(And is STILL [always has been] the practice in the Easter Orthodox Church)
see: Tim Gallant’s article of ancient church quotes.