ISB ~ 1 Peter 2 v2

newborn infants:The imagery of new birth is applied to new converts (1:3), who need the milk of sound instruction to grow and mature in their faith (Heb 5:12).

• The simple elements of faith can be sought from the breasts of Mother Church, that is, from the teachers of the Old and New Testaments (St. Bede, On the Seven Catholic Epistles at 1 Pet 2:1-2).