I got asked about Moroni 8: 8 and the issue of "circumcision" posted earlier. Moroni 8 is a letter from Mormon to his son, Moroni. In the 8th verse he (Mormon) quotes the Savior as having said, in relation to infant baptism, the following: "I came into the world not to call the righteous but sinners to repentance; the whole need no physician, but they that are sick; wherefore, little children are whole, for they are not capable of committing sin; wherefore the curse of Adam is taken from them in me, that it hath no power over them; and the law of circumcision is done away in me." My response is this:
First, the comment is about "little children" who do not need ordinances. They do not need baptism, and they do not need circumcision. Little children are exempt and the requirements are fulfilled in every respect by Christ's atonement. Therefore, they needn't be baptized, needn't be confirmed, needn't have circumcision; and they needn't comply with any of the requirements for salvation because Christ atoned for all sin arising from the Fall of Adam. They, "little children" that is, are not sick and therefore do not need a physician.
The teaching leaves open, however, the question about adults. Originally circumcision was an adult ordinance. When restored through Abraham, it was made an infant ceremony. The Law of Moses kept it something for infants. Christ removed all accountability for any law in the atonement for all infants, through the age of 8, who are not accountable before Him.
The issue, however, is whether this is satisfied for adults as well. Moroni 8: 8 does not address that question. The earlier post does attempt to address it.